How to take advantage? Well, Mt. Gox still allowing withdrawals in other currencies (EUR) and it will allow USD withdrawals again in only 2 weeks. So wire money to Bitstamp, by BTC at 99 USD, transfer BTC to Mt. Gox, then sell at 111.5 USD (or the euro equivalent). Now you just made a $11.5 USD profit per bitcoin which is 12.5%. Take out 1% in trading fees and that is 11.5%. 11.5% profit and all you have to do is not have access to your USD for 2 weeks? Pretty good return on investment!
By the time the money wire to bitstamp has been done, Bitstamp will probably be back to GOX rates.
A big drop at Bitstamp for sure (down to $90 or something), and a great opportunity to buy < $100, but only for people with some cash at Bitstamp at that time.Not now, and certainly not when a wire transfer is complete.