The gentle maniacs at WordPress have released an open-source bulletin board system in alpha: bbPress.
bbPress is pretty new, but we’re certain of a few things:
1. Open Source, always and forever
2. Less (code) is more
3. Simplicity is a feature
4. Speed and security are the foundation of any good user experience
5. Put the user first
If bbPress can do to the phpBB culture over the next year what WordPress has done to Movable Type over the last, it’s going to become a force in online discussions.