How to Add Custom Logos to Your iPhone Using PwnageTool
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Just wanted to check, by changing the custom logo will I also be overwriting information on my iphone i.e. will all my data disappear as well? Or doing this only changes the custom logo and doesn't affect anything else..? thx!

Thanks again guys! this is exactly what i was looking for! now my iphone 3g is looking cool when i reboot! http://www.iphone-e-ipod.info

For some reason it crash when trying to change the image, i used png, 24 bits, 320x480. What's alpha layer/channel? thanks for the tutorial, but most of all, for a place to have feedback :D