BuddyPress.org

So Nicola, did you ever create the plugin?

I would like to see the ability to create Groups in the Admin site and have the users automatically added to the group based upon a response to a question in their account creation screen. Then the users would be able to create sub groups and have control over those sub groups.

It would also be nice to be able limit access to categories based upon the Main group the subscriber is assigned to.