GNU Social-P2P is a distributed/peer-to-peer, privacy-enhanced, user-controlled social network.

The goals of Social-P2P include:

• Full user control over their social networking infrastructure
• Privacy guarantees enforced through strong crypto and integration with pre-existing privacy-enhancing technologies
• Integration with other free social networking systems (such as OStatus)
• A diversity of user interfaces, with an aim towards social integration in existing applications

Mailing list: http://lists.gnu.org/mailman/listinfo/social-p2p
Gitorious page: http://gitorious.org/social-p2p/