Social Networking services

http://www.facebook.com/

http://twitter.com/

http://www.linkedin.com/

http://www.myspace.com/

http://www.hi5.com/

http://www.bebo.com/

http://www.friendster.com/

http://www.perfspot.com/

http://www.zorpia.com/

http://www.en.netlog.com/

http://www.habbo.com/