BuddyPress.org

@crashutah: no problem, here’s what I have in my theme functions.php to create the new widget (I have it named “profile_BP_Groups_Widget”, but you could change that to whatever, of course):

http://pastebin.com/AUnUNbpM

It just creates a normal new widget, so if you wanted to put it in an existing sidebar, you could just drag it on over. I just widgetized the area under the member avatar for my site. I do have the size of the group avatars being controlled by a div wrapped around the widgetized area, so you might want to add something of the sort around the code in the actual widget so that you can control those via CSS.