There is a new program being developed based on xpwn called Jailbird. It will jailbreak, activate and unlock your iPhone 2G or iPod touch 1G and jailbreak (and/or activate) the iPhone 3G. It is a complete replacement for Winpwn which will build custom IPSW files and support firmware 2.2. The initial release is scheduled for sometime in February and will include root partition resizing and custom boot images.

The developers of this project are:
The Dev-Team (iGods)
difrnt (Programmer for Jailbird)
Doc (Graphics Artist for Jailbird)

Read more on Jailbird official Blog.