"By the way, are Facebook's numbers even public? How do you know they're losing money?" -

http://money.cnn.com/2009/01/07/technology/hempel_threepoint...

"[FB] Revenues for 2008 are expected to be about $275 million this year, according to several sources, and it is still not profitable."

it's common knowledge that none of the recent major "web2.0" players have made any or significant profits.