what about all the coins that were transferred and/or cashed out
Dollars cashed out? Might be reversible. BTC transferred to an address? Irreversible. Don't worry about your lucky 80 coins
If it was attacked as described, the person who sold all the btc, then purchased them again at .01btc would have moved the price such that they potentially could have withdrawn 100k BTC. But that depends if mtgox uses a 1/2/14-day average or spot-price for how they determine their 1k limit.