BuddyPress.org

Thanks for the suggestion + info Erich73. I sent him an email.

EDIT: He already answered:

Unfortunately I don’t have a good answer for you. Buddypress already works like P2 in so many ways – have you had a look at BuddyPress 1.2?

My best suggestion is just to dig through the source, especially the javascript and php -> javascript files. They’d leave you with the best clue.

Although, I think BuddyPress probably has all of your needs covered.

Dead end…