BuddyPress.org

Absolutely! I’m using it for an accordion widget in my soon to be released theme. I’ve also written a tutorial for creating a TOOLs powered welcome slider:

http://www.bp-tricks.com/design/creating-a-jquery-welcome-slider-for-your-buddypress-homepage/

It works great, causes no conflicts and it’s very lightweight. Be sure to include the js at the top your header btw, because other JS scripts might cause conflicts if they are loaded first.

If you make anything cool with it let me know