BodyPress with wordpress is indeed the best just as anest suggested. I've got it running on a few sites of mine.
I used word press, mybloglog, and other some high competitive social community sites, particularly I don’t have idea which are the best, but I got good result with them.
Is it Buddypress or bodypress? I had googled and I am unable to find bodypress, there is only Buddypress. It seems to be a good script, I myself is trying to prepare a social platform for the students to interact, will try this.