This 3.0 beta preview version has been almost completely re-written with newer WordPress APIs so previous hacks and work arounds are kaput. It should also now work with BuddyPress and WordPress MU. We’ve also added a to-do list for each post. More documentation coming soon. Please let us know what you think. If you’re not a developer or hardcore WordPress user, we recommend sticking with the 2.8 release for now.
The newest version 3.0e beta fixes an issue with the “Share and Follow” plugin not appearing correctly and hyperlinks not appearing correctly in posts.
Get it: P2 Reloaded 3.0h Beta on August 10, 2011 includes various bug fixes