That's really unfortunate, sorry for your troubles.
You should try not to keep so many BTC in the same place though, unless you're immediately going to execute a trade.. A bit late for that, I know, but don't let this one bad experience turn you off BTC completely. Keep an encrypted wallet file on a USB key, or encrypted with something like Kleopatra, and never keep all your BTC in the same wallet.
Hope you can get some sort of resolution with Mt. Gox though.