This is worth reading - analysis of the bust, with an informative graph:
http://numismatics.pwnz.org/?p=222Summary - it could've been much worse, Gox will have a chance to get their crap together.
It depends, if Gox is forced to comply with legislation that has to disclose the sender and recipients of all USD transactions that they handle, the could be tricky for invalidated accounts. The may feel that they would loose too much business to do so.