http://theumlaut.com/2013/03/20/the-war-on-bitcoin-and-anonymity/Article on the recent FinCEN announcement and bitcoin.
If there is any silver lining in an era in which the government is so paranoid that it feels it must stamp out financial anonymity online, it is that it is unlikely to completely succeed. There may be a few exchanges and mixers that register and report as FinCEN requires. But it seems improbable that the US and its allies are willing to engage in the blatantly repressive behavior necessary to ensure full compliance. Nevertheless, it is regrettable that FinCEN has designs on Bitcoin. It is yet another reason that the Wars on Drugs and Terror cannot end soon enough.