Just a rough guesstimate, I'd say somewhere from 100-500 btc was lost in this mess.
It was apparently more then that. According to
this thread, all the
BTC was sent to a single
address, and totals just shy of 5,750
BTC.
Couldnt have lost the whole 5750btc cause there had to be some payouts from some address. I havent checked the addy but there are onlyincomming transactions on it?