Well, this sugguestion comes from the stock behavior of phpbb... In PHPBB when you setup a group, you can assign a group owner, this owner (or owners) has (have) the ability to add users into their group; pretty simple.

To up it an antie, users can also request to join groups, whereas the group owner would have the ability to accept or deny the request.

yes indeedie....

I really want PHPBB's group system for a ton of reasons, but mainly I love how you can make a group be the moderator for the forum.

Yeh, they did some things horribly, but the group system, i think they hit the nail on the head... It works so well, i absolutely love how it works; and hope someday that the ubb has something that can at least come close to it...

It could also go quite well with payment serives in a future version of ubb ...