LinkedIn has valued itself at $500 million and both LinkedIn and Facebook are letting employees sell off a portion of their vested stock. LinkedIn reports its annual revenue at $100 million. Facebook for 2007 was $150 million in revenues, but projects this to reach $350 million for 2008. Friendster, largest social network in Malaysia, the Philippines, Singapore and Indonesia, announced that it raised $20 million in investor funding.

Resources:

Venturebeat.com
kara.allthingsd.com
www.socialtimes.com