I understand what you're looking for, but that's getting very into a full-blown affiliate extension. It's a great idea, and something that is lacking for Joomla, but not something we're working on.
For now, I'd gladly state that we can add the rewarding of points for inviting users.
However, rewarding points to the inviter and automatically making them friends is more difficult for two reasons:
* For the friend request being accepted, Facebook will not supply the user id of the user accepting the request *until* they have clicked the login button and approved your app. If they supplied the ID before then, it'd be a privacy issue. So, to reward points, that would mean we'd have to do more tracking after the initial acceptance, which, as noted above, could be a lot of work.
* Automatically creating a friend link could make some users unhappy. If we added it, it would be an option, but would still require the additional tracking as mentioned above, which we're not signing up for right now.
Hope that helps explain. We'd love to have you as a subscriber, but I won't make promises we can't keep.
Alex