Wirelessly posted (Apple iPhone 3G: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F136 Safari/525.20)
This can be done in quickpwn without re-jb. There's a thread somewhere that explains the process and has a link to a video of someone doing it. You have to open the quickpwn.exe and replace the boot/recovery logos using a zipping program, then run it with only replace logos checked.