My guess is that the selling account that was hacked was the mtgox owner's account itself.  If you're thinking along those lines that should answer a few questions.

Who has that much money?  The exchange that profits from every trade.

Why would they roll back the trades?  It was their account that was selling at $0.01.  

How did they decide to break their own rules so quickly and make it public?  Their own money was at stake.

Good luck getting them to not reverse the trades.  That would probably put them out of business and negatively effect the bitcoin itself.  I had a standing order at $0.01 and managed to pick up $14 worth of coins at that price.  But even I realize that these trades must be rolled back in order to prevent a loss of confidence by the investor group.  Anyone who deals with real trading will tell you that.  I also lost out big when they reversed trades on the NYSE after the flash crash 15 months ago... But I understand why these things happen.  Get over it and be glad that you got the BTC you did out of the market.  I wish I had been as smart, but I got greedy and withdrew nothing.  People like you who did get $ out of the system will probably cause mtgox to have some losses, but that is probably what they deserve for allowing this to happen.  At the end of the day, you made a little easy money and mtgox will restore confidence and keep the bitcoin economy alive.  It's a win-win.  

My $0.02.