I haven't looked at it yet..
Right now I'm looking at adapting vBulletin into a combo 'matchmaking/myspace' -style community.
I'm a webmaster, as opposed to a programmer, so I need something that's easy to admin, and vB is easssssssssy.
But a friend says I sould really wait for the release of Alicia from the phpIzabi folks. PhpIzabi is really cool, and Alicia is supposed to be even better (and open source)