Socialnetworking

http://www.schneier.com/blog/archives/2010/08/a_taxonomy_of_s_1.html social network user data categorization by Bruce Schneier (useful)

http://www.slideshare.net/padday/the-real-life-social-network-v2 A great presentation [from google] about how people interact socially in the real life and how current social networks represent them. (Needs about 30 min to read)

http://sql.ru/forum/actualthread.aspx?tid=754989 Some comments on modeling friendlits user activity, for social media websites (or apps)

http://www.wiseclerk.com/group-news/services-p2p-lending-companies-by-loan-volume/ interesting post about small loans/micro credits, or another term: P2P banking

http://wua.la/ social everything, now it’s social online file sharing

https://www.bewelcome.org/ online social network based around translation / multi-lingual

http://github.com/ new paid web service based on Git

http://bradfitz.com/social-graph-problem/ FOAF