Good news is that you can still use redsn0w 0.8 to jailbreak firmware 3.0.1. Here’s the step-by-step plan:

1. Download both firmware 3.0 and firmware 3.0.1 (link).
2. Download redsn0w 0.8 (link).
3. Update or restore to official 3.0.1 in iTunes.
4. Run redsn0w.
5. When redsn0w asks you to identify the IPSW used, point it at the 3.0 IPSW instead of the 3.0.1 one.
6. Follow the instructions.
7. After the jailbreak, reinstall ultrasn0w 0.9 if you need the unlock.

These are the first images of a Jailbroken iPhone 3GS. GeoHotz published them in his blog. DevTeam will publish an updated release of the tool only after the release of firmware 3.0.1. The reason is simple: Given that the Firmware 3.0 is full of bugs, it is clear that Apple will release an update soon. If the DevTeam release new tool, Apple will probably be able to block them with the next update. Tomorrow afternoon we will find more details on the official DevTeam blog. By the way firmware 3.0.1 is scheduled to be released in July.

Here are download links for the latest versions of software for iPhone, iPod Touch and iPad jailbreaking, activating and unlocking:

evasi0n | RedSn0w | Sn0wBreeze | PwnageTool | Absinthe |GreenPois0n | iReb | iBooty | iFaith | UltraSn0w | LimeRa1n | Spirit | BlackRa1n | BlackSn0w | PurpleRa1n

For iOS 4.0, iOS 4.0.1 and iOS 4.3-4.3.3 you can use http://jailbreakme.com

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evasi0n

evasi0n 1.5.3 (untethered iOS 6.0 – iOS 6.1.2 jailbreak for all devices: iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod Touch 4G, iPod Touch 5G, iPad 2, iPad 3, iPad 4, iPad mini)

• Windows:
  • depositfiles
  • box.net
  • mega
• Mac OS X:
  • depositfiles
  • box.net
  • iphoneroot.com
  • mega
• Linux:
  • depositfiles
  • box.net
  • iphoneroot.com
  • mega

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Sn0wBreeze

Sn0wBreeze 2.9.14 (tethered iOS 6.1.3 jailbreak for iPhone 3GS, iPhone 4, iPod Touch 4G, untethered for old-bootrom iPhone 3GS; untethered for iOS 6.0 – iOS 6.1.2)

• http://qwertyoruiop.com/static/mirror/sn0wbreeze-v2.9.14.zip
• http://iphoneroot.com/download/sn0wbreeze-v2.9.14.zip

Sn0wBreeze 2.9.13 (untethered iOS 6.0 – iOS 6.1.2 jailbreak for all iPhone 3GS, iPhone 4, iPod Touch 4G)

• https://github.com/iH8sn0w/sn0wbreezedl/archive/master.zip
• http://iphoneroot.com/download/sn0wbreeze-2.9.13.zip

Sn0wBreeze 2.9.7 (supports tethered jailbreak of iOS 6.0.1 for iPhone 4, iPhone 3GS, iPod Touch 4G)

• https://github.com/downloads/iH8sn0w/sn0wbreeze/sn0wbreeze-v2.9.7.zip

Sn0wBreeze 2.9.6 (pwnagetool for windows, supports untethered jailbreak of iOS 5.1.1 for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad and Apple TV 2G)

• http://gbit.mirror.devkipz.us/sn0wbreeze-v2.9.6.zip
• http://iphoneroot.com/download/sn0wbreeze-v2.9.6.zip

Sn0wBreeze 2.9.3 (pwnagetool for windows, supports tethered jailbreak of iOS 5.1 for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad; untethered for iPhone 3GS with old bootrom; untethered for iOS 5.0.1, iOS 4, iOS 3 supports Apple TV 2G)

• http://downloads.ih8sn0w.com/sn0wbreeze-v2.9.3.zip
• http://iphoneroot.com/download/sn0wbreeze-v2.9.3.zip

Sn0wBreeze 2.9.1 (pwnagetool for windows, supports untethered jailbreak iOS 5.0.1, iOS 4, iOS 3 for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad)

• http://downloads.ih8sn0w.com/sn0wbreeze-v2.9.1.zip
• http://iphoneroot.com/download/sn0wbreeze-v2.9.1.zip

Sn0wBreeze 2.8b11 (pwnagetool for windows, supports iOS 5, iOS 5.0.1, tethered jailbreak for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad, Apple TV 2G; untethered for iPhone 3GS with old bootrom)

• http://hotfile.com/dl/134691967/4171147/sn0wbreeze-v2.8b11.zip.html
• http://iphoneroot.com/download/sn0wbreeze-v2.8b11.zip

Sn0wBreeze 2.7.3 (pwnagetool for windows, supports iOS 4.3.3, untethered jailbreak for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad, Apple TV 2G)

• http://hotfile.com/dl/125818066/1eeeede/sn0wbreeze-v2.7.3.zip.html
• http://iphoneroot.com/download/sn0wbreeze-v2.7.3.zip

Sn0wBreeze 2.2.1 (pwnagetool for windows, supports iOS 4.2.1, jailbreak for iPhone 4, iPhone 3GS, iPhone 3G, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G, iPad)

• http://iphoneroot.com/download/sn0wbreeze-2.2.1.zip

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RedSn0w

redsn0w 0.9.15b3 (tethered iOS 6 jailbreak for iPhone 3GS, iPhone 4, iPod Touch 4G; untethered for iPhone 3GS with old bootrom)

• Download version 0.9.15b3 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.15b3.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.15b3.zip
• Download version 0.9.15b3 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.15b3.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.15b3.zip

redsn0w 0.9.14b2 (downgrade 06.15 baseband to 05.13, get back GPS and iltrasn0w unlock for iPhone 3GS and iPhone 3GS)

• Download version 0.9.14b2 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.14b2.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.14b2.zip
• Download version 0.9.14b2 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.14b2.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.14b2.zip

redsn0w 0.9.13dev3 (tethered iOS 6 jailbreak for iPhone 3GS, iPhone 4, iPod Touch 4G)

• Download version 0.9.13dev3 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.13dev3.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.13dev3.zip
• Download version 0.9.13dev3 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.13dev3.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.13dev3.zip

redsn0w 0.9.12b2 (untethered iOS 5.1.1 jailbreak for all devices: iPhone 3GS, iPhone 4, iPhone 4S, iPad 1, iPad 2, iPad 3, iPod Touch 3G, iPod Touch 4G)

• Download version 0.9.12b2 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.12b2.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.12b2.zip
• Download version 0.9.12b2 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.12b2.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.12b2.zip

redsn0w 0.9.12b1 (untethered iOS 5.1.1 jailbreak for all devices: iPhone 3GS, iPhone 4, iPhone 4S, iPad 1, iPad 2, iPad 3, iPod Touch 3G, iPod Touch 4G)

• Download version 0.9.12b1 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.12b1.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.12b1.zip
• Download version 0.9.12b1 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.12b1.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.12b1.zip

redsn0w 0.9.11b4 (tethered iOS 5.1.1, iOS 5.1 jailbreak for iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G; untethered iOS 5.0.1 jailbreak for all devices, including iPhone 4S, iPad 2; save unlock tickets)

• Download version 0.9.11b4 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.11b4.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.11b4.zip
• Download version 0.9.11b4 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.11b4.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.11b4.zip

redsn0w 0.9.10b8 (tethered iOS 5.1 jailbreak for iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G; untethered iOS 5.0.1 jailbreak for all devices, including iPhone 4S, iPad 2; save unlock tickets)

• Download version 0.9.10b8 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.10b8.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.10b8.zip
• Download version 0.9.10b8 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.10b8.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.10b8.zip

redsn0w 0.9.10b7 (tethered iOS 5.1 jailbreak for iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G; untethered iOS 5.0.1 jailbreak for all devices, including iPhone 4S, iPad 2)

• Download version 0.9.10b7 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.10b7.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.10b7.zip
• Download version 0.9.10b7 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.10b7.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.10b7.zip

redsn0w 0.9.10b6 (tethered iOS 5.1 jailbreak for iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G)

• Download version 0.9.10b6b for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.10b6b.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.10b6b.zip
• Download version 0.9.10b6 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.10b6.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.10b6.zip

redsn0w 0.9.10b5c (untethered iOS 5.0.1 jailbreak for iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G)

• Download version 0.9.10b5c for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.10b5c.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.10b5c.zip
• Download version 0.9.10b5c for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.10b5c.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.10b5c.zip

redsn0w 0.9.9b9d (tethered iOS 5.0.1, iOS 5 and iOS 4.3.5 jailbreak for iPhone 3GS, iPhone 4, iPad, iPod Touch 3G, iPod Touch 4G; untethered for iPhone 3GS with old bootrom; supports untethered iOS 4.3.3 jailbreak)

• Download version 0.9.9b9d for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.9b9d.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.9b9d.zip
• Download version 0.9.9b9d for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.9b9d.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.9b9d.zip

redsn0w 0.9.9b8 (tethered iOS 5.0.1, iOS 5 and iOS 4.3.5 jailbreak for iPhone 3GS, iPhone 4, iPad, iPod Touch 3G, iPod Touch 4G; untethered for iPhone 3GS with old bootrom; supports untethered iOS 4.3.3 jailbreak)

• Download version 0.9.9b8 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.9b8.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.9b8.zip
• Download version 0.9.9b8 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.9b8.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.9b8.zip

redsn0w 0.9.9b7 (tethered iOS 5, iOS 4.3.5 jailbreak for iPhone 3GS, iPhone 4, iPad, iPod Touch 3G, iPod Touch 4G; untethered for iPhone 3GS with old bootrom; supports untethered iOS 4.3.3 jailbreak)

• Download version 0.9.9b7 for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.9b7.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.9b7.zip
• Download version 0.9.9b7 for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.9b7.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.9b7.zip

redsn0w 0.9.6 rc16 (supports untethered iOS 4.3.3 jailbreak for iPhone 3GS, iPhone 4, iPad, iPod Touch 3G, iPod Touch 4G)

• Download version for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.6rc16.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.6rc16.zip
• Download version for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.6rc16.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.6rc16.zip

redsn0w 0.9.8b7b (supports untethered iOS 4.3.3, tethered iOS 4.3.5, iOS 5 jailbreak for iPhone 3GS, iPhone 4, iPad, iPod Touch 3G, iPod Touch 4G; untethered for iPhone 3GS with old bootrom)

• Download version for Mac OS X:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_mac_0.9.8b7b.zip
  • http://iphoneroot.com/download/redsn0w_mac_0.9.8b7b.zip
• Download version for Windows:
  • https://sites.google.com/a/iphone-dev.com/files/home/redsn0w_win_0.9.8b7b.zip
  • http://iphoneroot.com/download/redsn0w_win_0.9.8b7b.zip

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PwnageTool

PwnageTool 5.1.1 (untethered iOS 5.1.1 jailbreak for iPhone 3GS, iPhone 4, Apple TV 2G, iPad 1, iPod Touch 3G, iPod Touch 4G)

• https://sites.google.com/a/ipad-dev.com/files/pwnagetool/PwnageTool_5.1.1.dmg
• http://iphoneroot.com/download/PwnageTool_5.1.1.dmg

PwnageTool 5.0.1 (supports untethered iOS 5.0.1 jailbreak for iPhone 3GS, iPhone 4, Apple TV 2G, iPad, iPod Touch 3G, iPod Touch 4G)

• Official Torrent
• http://iphoneroot.com/download/PwnageTool_5.0.1.dmg

PwnageTool 4.3.3.1 (supports untethered iOS 4.3.3 jailbreak for iPhone 3GS, iPhone 4, Apple TV 2G, iPad, iPod Touch 3G, iPod Touch 4G)

• Official Torrent
• http://iphoneroot.com/download/PwnageTool_4.3.3.1.dmg

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iReb

iReb (Windows tool that will put your device into a pwned state so that you can upload custom firmware to it)

• http://downloads.ih8sn0w.com/iREB-r5.zip
• http://iphoneroot.com/download/iREB-r5.zip

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iBooty

iBooty (Utility to Boot Tethered iPhone 4, iPhone 3GS, iPad, iPod Touch 3G, iPod Touch 4G after Sn0wBreeze jailbreak)

• iBooty iOS 5.0: iBooty-for-5.0.zip
• iBooty iOS 5.0.1: iBooty-for-5.0.1.zip
• iBooty iOS 5.1: iBooty-for-5.1.zip

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iFaith

iFaith 1.4.2 (Windows tool that will save SHSH keys for your current installed iOS)

• http://downloads.ih8sn0w.com/iFaith-v1.4.2_windows.zip

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Absinthe 2.0

Absinthe 2.0.4 (supports untethered iOS 5.1.1 jailbreak for iPad 3, iPad 2, iPad 1, iPhone 4S, iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G)

• Download version for Windows:
  • https://sites.google.com/site/greenpois0nabsinthe/absinthe-win-2.0.4.zip
  • http://iphoneroot.com/download/absinthe-win-2.0.4.zip
• Download version for Mac OS X:
  • https://sites.google.com/site/greenpois0nabsinthe/absinthe-mac-2.0.4.dmg
  • http://iphoneroot.com/download/absinthe-mac-2.0.4.dmg
• Download version for Linux:
  • https://sites.google.com/site/greenpois0nabsinthe/absinthe-linux-2.0.4.tar.bz2

Absinthe

Absinthe (supports untethered iOS 5.0.1 jailbreak for iPad 2 and iOS 5/5.0.1 jailbreak for iPhone 4S)

• Download version for Windows:
  • http://cache.greenpois0n.com/dl/absinthe-win-0.4.zip
  • http://iphoneroot.com/download/absinthe-win-0.4.zip
• Download version for Mac OS X:
  • http://cache.greenpois0n.com/dl/absinthe-mac-0.4.zip
  • http://iphoneroot.com/download/absinthe-mac-0.4.zip
• Download version for Linux:
  • http://cache.greenpois0n.com/dl/absinthe-linux-0.4.tar.gz
  • http://iphoneroot.com/download/absinthe-linux-0.4.tar.gz

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GreenPois0n

GreenPois0n RC5 (supports firmware 4.1 and 4.2.1 jailbreak for iPhone 4, iPhone 3GS, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G, iPad)

• Download version for Mac OS X:
  • http://cache.greenpois0n.com/dl/gp_mac_rc6_1.zip
  • http://iphoneroot.com/downloads/gp_mac_rc6_1.zip
• Download version for Windows:
  • http://cache.greenpois0n.com/dl/gp_win_rc6.1.zip
  • http://iphoneroot.com/downloads/gp_win_rc6.1.zip

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UltraSn0w

Current version is ultrasn0w 1.2.3, download in Cydia (unlock for iPhone 4, iPhone 3GS, iPhone 3G, firmwares 3.0-4.3.3; it supports basebands 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00)

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LimeRa1n

LimeRa1n (supports firmware 4.0-4.1, jailbreak for iPhone 4, iPhone 3GS, iPod Touch 3G, iPod Touch 4G, iPad)

• Download version for Windows or Mac

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Spirit

Spirit for Windows and MAC OS (jailbreak for all devices – iPad, iPhone, iPod Touch, firmware 3.1.2, 3.1.3, or 3.2)

• Download version for Windows
• Download version for MAC OS X

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BlackRa1n

blackra1n for Windows and MAC OS (jailbreak for all devices, firmware 3.1.2)

• http://blackra1n.com/

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BlackSn0w

BlackSn0w for Windows and MAC OS (unlock for iPhone 3G and iPhone 3GS, firmware 3.1, 3.1.2)

• Avaliable in Cydia (repository http://blackra1n.com/) and via BlackRa1n utility

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PurpleRa1n

Purplera1n for MAC (Beta jailbreak for iPhone 3GS, firmware 3.0)

• Download version for MAC

Purplera1n for Windows (Beta jailbreak for iPhone 3GS, firmware 3.0)

• Download version for Windows

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Older software versions:

You can download older software versions here.absinthe-mac-0.1.2-2.zip