It looks like the gap between mtgox and bitstamp will widen increasingly until in a few days or weeks when/if mtgox pulls through and isn't shut down, and the dwolla-reaction BTC rushes back in, bitcoin blasts off whilst mtgox suffers a major correction. Damn I wish I had a USD bank account for the arbitrage
LOL. WTF ? Were you seriously expecting MtGox to be shut down ?
They are not in the US, US law doesn't apply in Japan. Get real.
Well, the truth is that Japan is not Russia - I mean they would pretty much do what the US says. Still, I do not think that there is a big risk that Gox will be shut down in the next few days.
There's always been a risk of exchanges being shut down. Bitcoin undermines the status quo of the powerful, thus an attack/hostile attitude from Governments is expected from the very beginning. Actually till now we had too "friendly" attitude toward Bitcoin, but is foolish to believe that the FED won't fight back cryptos at some point.
That said, is also foolish to overreact to the Dwolla situation. The chance of Gox being shut down today is pretty much the same of Gox being shut down two weeks ago. If it happens, will happen suddenly - without prior notice. That is one of the many reasons why Bitcoin is a high-risk investment, everybody should understand that the Bitcoin thing is a gamble, because of many aspects of it.