We all saw that coming when the guy who runs btcex.com was involved in some DDoS attacks against other exchanges a couple of months ago. That was the time to get out.
Unless you plan to go to Russia and hunt the guy down, there is probably nothing you can do.
You're right, I did see it coming as soon as I heard he was doing the attacks. However his site was also down when he was doing the attacks, and I wasn't able to get my money out because its been down ever since then. At least, by the time I
knew he was the one doing the attacks...