Facebook to lose $150 million in 2008

Mark Zuckerberg called an all-hands meeting at Facebook to discuss the company's financials, Kara Swisher reports at AllThingsD. Headcount will swell from 450 to 1,000 this year. (To put that in context, Google adds more employees in a single quarter.) Revenues, at $150 million in 2007, are projected to fall between…