found this site of project comparisons on GNU social site. perhaps something useful here?
Commodity webhosting approach
StatusNet .. Crabgrass .. ownCloud .. Diaspora .. Elgg .. Cyn.in .. Lorea .. Pinax .. Open Atrium .. SMOB .. BuddyPress .. Daisychain .. Partuza .. The Appleseed Project .. Socknet .. Get6d .. Knowee .. Dutch .. exo Social .. DiSo .. Movim .. Jappix .. HelloWorld .. OpenCollab .. Kopal .. RSSN .. Noosfero.. Friendika .. NOT FREE: iSocial .. Persona .. Safebook
Federation of Servers approach
XMPP .. OneSocialWeb .. Google Wave .. Mycelia .. PSYC .. Higgins ..
Peer-to-peer (P2P) / Distributed Hashtable (DHT) approach
GNUnet .. I2P .. Tahoe LAFS .. CSpace .. Angelapp .. RetroShare .. The Circle .. Sydnie .. Netsukuku .. Peerscape .. NOT FREE: LifeSocial .. PeerSoN .. Opera Unite .. Osiris ..
Social desktop applications
Nepomuk for KDE .. Social Desktop for KDE ..
In-browser profile + certificates approach
None
Distributed Node Architecture
Distnode
