Here we go again, do you understand that FinCEN does not and cannot regulate security trading? It's not their job and they don't care. MtGox registers as a money transmitter, not a market money with SEC and CFTC.

This is clearly a step forward, well unless you are one of the bad guys who lives off by laundering black money, that is. If that's the case, Bitcoin is not for you. Go launder your money somewhere else, and keep BTC clean.