In all honesty, I think the Mt Gox attack is going to be good for BTC in the long run:

1. It forces providers of vital services like exchanges and eWallet providers to really re-consider their security measures, which is good for all of us.
2. It will help to cement public opinion of bitcoin as something with real value - after all, most people won't go out of their way to hack and steal something with no real value, right?