the short answer? no.
no one is successfully going to class action Gox. Bitcoins aren't real. What are they going to cry to the government about, a missing computer hash?
not to mention, the governments have been warning people not to buy it for a long time. Bitcoins don't exist, they're not recognized as currency, so nothing was stolen when you bought "air" with your real money.

I had 60k on there and transferred funds to btc to withdraw them. I got about 25% out and the rest ended up stuck in btc while the value dropped. They could not have planned it better for people like me. Now I don't have any amount of usd worth suing over. If you had enough btc tied up I would think legal action would be possible. It's still theft like anything else.