We played around with BuddyPress but now all the sudden it seems like rolling out BuddyPress with our current them (TwentyTen) doesn't seem like it will work out all that well.  While I can navigate around alright I'm not so sure that someone "new" would be able to.  They haven't been pounding on BuddyPress installs since it first came out. So we played around with bbPress on the WordPress Lab but that has the same ackward look and feel when applied to TwentyTen.  Sadface.  :(