BuddyPress.org

I am looking at fun ways to extend Buddypress Groups and wanted to start a discussion thread on this topic. I am hoping for brainstorming ideas that might benefit those looking for creative ways to extend Groups. I will offer a few good ideas and then hope that others might weigh in and contribute their own.
1. I used BP Group Extras to create extra group tabs. Then used WPUF Pro to create a front end post form in the new tab, allowing group members to post on various topics that I define for each group. I then used Ultimate Post Widget to display the group posts in the same sidebar of the group as well as on the Activity page.
2. I used the Group Tag Cloud plugin to create a tag cloud of different types of groups in the header (Social groups, writing groups, etc).

If you know of any fun plugins, especially to get members interacting or playing games then please contribute your ideas to this thread!