How long is it taking to get USD into Mt Gox? Could be the trade of the year if they ever allow bitcoin withdrawal again.
Try sending to Karpeles' personal address, that's how Chinese solved it with huobi. Just a thought though, you may wait out till gox dies and than attempt to withdraw through his personal wallet (maybe even attempt multiple withdrawals).
Quick estimation per 1000 $ USD:
Buy in at price ~50$ (in a few days) -> 20 BTC
At least three fake withdrawals succeed (4 altogether) -> 80 BTC
Sell at rebound on stamp (850 $) -> 68000 $