I would suspect that almost any company dealing in the US will face a bumpy road for the next few years until things get hammered down.  I had mentioned to a friend a few months ago that I would expect any company based in the US (and even those who are not) will be dealing with anit-terrorism laws as that seems to be the trump card lately.

I had read an article that was talking of the freedom of bitcoin- how they are not subject to taxation or any countries laws and laughed.  Anything that grows big enough to ping a law makers radar will eventually be regulated the best that they can.  The IRS has even declared the sale of gold to be a taxable event by using capital gains rules.  Anybody who did not think that the bureaucracy and the tax man would make a grab at a multi million dollar market is delusional.  Anybody who does not think they will eventually point out to a judge that you cannot have money moving across international boarders anonymously without the risk that some will end up possibly funding a terrorist has not been paying much attention to the modern tactics of western governments.

Having said that, where will the new clearing houses base themselves?  If they do business in the US they will be subject to certain laws and I do not know if I would trust a provider based in the Caribbean anyhow...

My guess would be that we can expect these types of seizures and delays in transactions until a number of court challenges have concluded, the IRS finds a way to tax them and homeland security finds a way to track them.  I would not plan on being assured of access to and easy market to transfer bitcoin to USD without some delays for awhile.