Okay another update on this situation.
Total calculated loss is way over 20BTC.
That account withdrew 22.5 BTC in total, and when exchange was out of BTC he used his fake balance to buy alot of ZET.
After reviewing all logs, exchange is running short for ~66 BTC.
Donations barely covered that, so I'm now making a deal with an investor who wishes to buy a share of the exchange.
I will use funds gained from that to cover the loss and resume the service.
Thus, I presume it could take a little more than 24hrs (though we're trying to make this deal as soon as possible).
Please give us some more time to fix all the mess and resume the operation.
Thats too bad. Lets see if legal recourse can help you.
Any details on how the attack was done? I remember a couple of weeks back some pool got drained of its funds.