Redmondpie have completed the HTC Hero theme for iPhone. They have done a really good job because it looks good:

It works on jailbreaked iPhones via Winterboard. Here is a link to step-by-step installation instructions. I guess this theme will appear in Cydia quite soon, so installation would be much easier.

Here is a video that shows this HTC Hero theme on iPhone:

via redmondpie