Very sad news, USA just can't stay out of anything can they? But at the same time, this is probably quite bullish for bitcoin. LR was the new e-gold, every HYIP, autosurf and similar business was using LR...It was quite massive, tons of people where using it. Now those people can go to perfect money, hdmoney etc, but the same thing could happen there... Perhaps people will start looking for real alternatives that can't be shutdown, otherwise this trend will continue. Money laundering = transfering money outside of the banking system. Such BS charges.
The one short term risk is people being forced to liquidate BTC. If 150M of fiat just got nuked, people are going to have to sell something to make up for that. Will be interesting to see if there's a number of large coin dumps today.
MtGox has now lost Dwolla and LR. I'm not sure how much LR was used but it might slow down some fiat coming into the exchange at least for the very short term.
Med/Long term this is great news.