People reading this thread might be interested to know that Mtgox has just now registered as a money transmitter with U.S. government agency FinCen (thanks Nagle for noticing that).

Since one possibility is that the difficulty with USD withdrawals is due to Mtgox not being properly registered in the U.S., it seems to me that this increases the chances that Gox will successfully fix the problem with the wires (and possibly someday even add back Dwolla).