The developer, Kevin Rose, says this application will be avaliable officially via AppStore. No jailbreaking and hacking. The only concern.. will Apple approve it? I hope so. Watch the video:
PS: It will be free 
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This application is developed by Jay Freeman, the creator of the Cydia. Veency is a free app that allows iPhone owners to remotely control their iPhone from PC or Mac desktop via a VNC client.
Here are some of the features:
Of course you cannot do two finger gestures with this app. All other actions can be done with the click of your mouse. The only area in which Veency fails tragically at is when opening any video recording application on the iPhone.
This application is avaliable for jailbreaked iPhones via Cydia installer.
Be sure to restart your iPhone after installing Veency and connect to the server using a Wi-Fi connection. We recommend using or to connect your Windows desktop. If you’re using a Mac, we recommend .
Here is a video demonstration:
via readwriteweb