BuddyPress.org

My advice is to forget about chat tools for BP until the next round of major Web browser releases. That means Firefox 3.7 and IE 9, not sure about Chrome and Safari and Opera. Reason being, there are MAJOR changes coming with HTML 5 and some of those changes will make chat tools far more powerful (if developers take advantage of the new capabilities). So basically, if you spend a lot of time on getting chat working today, in six months you might want to toss it all in favor of newer more robust tools.

But that’s just my perspective.