Alternative to facebook coming soon:
"Our basic plan is the same: we’re going to build a great lightweight decentralized social networking framework and release it as AGPL software."
http://www.joindiaspora.com/
I have totally disabled my browser's access to these FB&co addresses:
http://*.facebook.*
http://*.fbshare.* ; facebook sharebutton
http://*.sharethis.*
http://*.fbcdn.*
http://*.twitter.*
http://*.tweetmeme.*
http://*.urtbk.*
http://*.addlvr.*
and many other nuisances...