Thank you for initiating this effort.
I have 10 point something BTC on MtGox and would like to join your action.
My preference would be to sue for the 10.x BTC.
If the terms of your action meant I had to sue for a USD amount, I would concede to that.
I don't have records or screenshots though, MTGox has that. Can part of the action also be to force MtGox to give up account records? I expect that I am not the only one who would need this.
This is the third BTC exchange collapse (or serious problem) I have been caught in. So yes, I know, I am very stupid to have lost 10+ BTC and not to have screenshots etc.
The glaring difference is that with the previous two events ( with Instawallet and Bitcoin 24) , those organisations were informative, helpful and ultimately proved good-as-their-word trustworthy: it took a long time but they diligently returned all BTC funds (to me at least).
Well, that may happen with MtGox of course, but their blank website says otherwise and does not point that way. I do not trust them.