Well i have already made my request at groupjive forum, but im desperate enough to promote again.
I research the the world of social network (from economists perspective) and the best, but obviosly the most practical solution i found is what blobble.net does (as you know build upon joomla).
It both reduce the complexity of the relation between members and groups, and gives a flexible but simple method for creating any kind of entities.
If you would make the possibility for users, to create projects, places, or events (etc) with the same options as for individuals and groups (own profile, own blog, own discussion board, and members), it would boost up joomla's future as a social CMS.
If it is possible: two more request, to make it even better.
-It would be fantastic option if a user could decide, where to publish his article beside his own blog. So he could publish the article to the appropriate group's blog, if he has the right (as a member) for that.
- Practically you have to give your adress in every social network. If the component could interpret the given country and city as a "place", new members would automatically get into familiar groups, in addition, a common part of a group and a place, like segment of tennis player group and London, give a new group: the tennis players in London group.
Good luck with Groupjive