You've got to be kidding me. This is obviously just investor valuation overload. Goldman paid 450 million for less than 1% of Facebook. Really....
So facebook has 500 million users. That means each user is valued at $100. And thats assuming that each user is an active user, which is not the case. The real valuation may be more like $250 - $500 per active user. That just doesn't make sense to me. Their primary revenue source is advertising. You get about $1 for every 1000 views in non-search advertising. If somebody visits their Facebook page once every day, then each user is worth $0.365 per year. To recoup the best case of $100 per user, that would take 300 years or so. As in, impossible. I don't know what those investors are smoking, but it must be Zuckerberg's !@#$.
In other news, Apple is worth more than Google. Seriously, and not by a trivial amount either.
Something is wrong with the world.