The number of coins that actually left MtGox is small and limited, so while those may be lost for good, the vast majority of the big theft are still with them, and reversing their trades will repair most of the damage. Perhapt Mt. Gox will personally compensate the remaining amount from their own wallets?
I think it's good this is happening while bitcoins is still so new and "fledgling." It's still in Beta. Anyone who didn't expect crazy stuff like this was naive, but the Bitcoin will emerge stronger. Stronger exchanges, stronger passwords, and lots of new information.
The market will heal.
The SPECULATOR (pump and dump) market will heal.
The LEGITIMATE vendor/consumer market will not.
Bitcoin grabbed the spotlight too early if it wasn't ready for prime-time.
Cause it got major fucking prime-time attention, and a whole hell of a lot more is coming next week, bet your bottom bitcoin (which is probably quite worthless at this point) on it.
BTC as anything but an "investors" circle-jerk and criminal paypal is gone, probably for good. Maybe in another year or two BTC might have a chance at being a legit e-currency, but it's doubtful...