Sounds like something you could build on top of Retroshare: http://retroshare.net/ http://retroshare.net/ If you can export the meta data you want from Facebo

Sounds like something you could build on top of Retroshare: http://retroshare.net/ http://retroshare.net/ If you can export the meta data you want from Facebook et al then you should be able to find a way to share it in an encrypted peer-to-peer network.