Matt Taibbi called Goldman Sachs a "giant vampire squid," and it appears that they've finally overstepped their bounds.  The Securities and Exchange Commission has filed charges against Goldman, accusing it of "Fraud in Structuring and Marketing of CDO Tied to Subprime Mortgages."

Well, what does all that mean? And what's going on with financial regulation, anyway? We ask economist Dean Baker of the Center for Economic and Policy Research and the blog Beat the Press to explain it all to us.