I found this plugin: http://wordpress.org/support/plugin/bp-group-hierarchy and have been testing it out.
It's interesting, but unfortunately, it doesn't seem to allow anyone but me (superadmin) to create groups (have tried just about every setting configuration I can think of). Anyway, I was wondering if the idea to do something similar to this had been kicked around here previous.
A brief series of searches didn't turn up anything, but I've not been around here very long, so I didn't know if the vets here maybe knew of a prior conversation, or something comparable? Neat idea, and extremely useful for the site I'm building...IF I can get it working! (have mailed the guy who wrote the one above, and will try again after the dust settles on the holidays, but in the meantime, I thought I'd check here too! :slight_smile: