well if you're stuck with GoxBux and GoxCoins, and can't get either out, you might as well swap them back and forth to try and make more of them. Those fees will keep Mark's hookers for a little longer.
Of course if you are not in GoxBux or coins you take a view on whether you think at a 20% discount to stamp its a a risk worth taking, or you think the Gox risk is worth more than that. Personally I wouldn't touch Gox at all but then I like Stamp.
Any chance Gox engineered the crash? If they are short a few thousand (or even a few tens of thousand) coin due to double transactioning wouldn't it make sense to drive the price down so that you could buy those coin back as low as possible. Then you can meet all the withdrawls and get back to business. Bitcoiners having the attention spans of gnats the chances are that once the withdrawls do start again then if the price stays below Stamp some people will come back and use your exchange again.