Why do you think the U.S. government have any interest in solving the problem after all they've done to create it?  If you are an enemy of Bitcoin and want to make trouble for alternative exchanges as well, SEC is the way.  Bitstamp can be closed any time due to obvious breach of an EU directive.  Bitfinex do their trading at Bitstamp and will go down the same drain.  What are we left with then?  Do you want to trust your money with BTC-E?  An exchange in China, perhaps?