Before you start scrambling to get a piece of the Facebook pie, it's worth looking at a few glaring risk factors.

Would you give this guy $2 million?

Excuse me for raining on the Facebook parade, but yesterday's news about the $450 million investment by Goldman Sachs (GS) and $50 million from Russia's Digital Sky Technology didn't move me the way it seemed to move others. This despite the suggested $50 billion valuation, as big and beautiful a number as the stock market has seen in some time. I am certainly not moved in the same way it appears to have moved Goldman's