That sounds exactly like the idea behind federated social networks. I've blogged about that in my post 'Think like the internet – Or how to fight Facebook, and

That sounds exactly like the idea behind federated social networks. I've blogged about that in my post 'Think like the internet – Or how to fight Facebook, and win" http://blogg.forteller.net/2011/think-internet/ http://blogg.forteller.net/2011/think-internet/