Wait, what do you mean "remember"?
Seems they've gone offline.
From a CNET story:
Embattled Bitcoin exchange Mt. Gox has largely vanished from the Internet amid accusations that the exchange is insolvent after a years-long theft that resulted in the loss of hundreds of millions of dollars.
The Web site for the Tokyo-based exchange has been wiped clean, as has its official Twitter feed. A screen shot posted by a Reddit user indicates that trading on the exchange has been halted.
The exchange's apparent shutdown was linked to an alleged hacking that went unnoticed for years, according to a purported internal Mt. Gox document circulating on the Internet. Labeled "Crisis strategy draft," the document reports that the exchange suffered a loss of 744,000 Bitcoins, about $350 million at Monday's trading, and outlines a scheme for restoring confidence in the exchange.