With you Yanks cheap and easy exit from BTC into Fiat shut off via Mt.Gox and Dwolla I think you might get a nasty lesson in just how important a route to Fiat is for the value of BTC.
I said pardon ?
You of course realize there are ways to fiat other than Dwolla, right ?
Sure. All cheap and easy routes into and out of Mt.Gox got GBP £ have been systematically shut down by UK banks since March. But Gox will happily send and receive wire transfers in Sterling or USD.
Problem is this involves hefty fees and losses in exchange rates from Yen to sterling. This makes smallish transactions into / out of BTC very expensive. Say BTC drops to $50 next week and yep i decide to take two of these USB miners now as in FIAT they have dropped from 2BTC to 1 BTC. But the costs to wire transfer and exchange £260 into 4 BTC can hit 20%!
I beleive Dwolla was popular becaus it was cheap and quick to get even small $ amounts into and out of BTC.
M