Social network client that works like BitTorrent (Score 2)

Instead of hosting a social network on a standard web site, it seems like to make it really distributed, it should be more similar to (but not exactly like) BitTorrent where the content originally local to the users computer/phone but mirrored to other client computers so that it is available widely without any sort of centralized control. The size of the content on a social network ends up being large but the updates are usually small. Just an idea, probably others have done it already.