10 Companies 'Less Valuable' Than Facebook

NEW YORK (TheStreet) -- Facebook has raised $500 million from Goldman Sachs and a Russian investor valuing the social-media giant at $50 billion, according to The New York Times' DealBook blog. But is Facebook really worth more than 83% of publicly-traded U.S. companies? Or more specifically, is 24-hour access to Mafia Wars worth more than international travel, clean drinking water and cancer ...