I have registered at http://www.mtgoxrecovery.com and so I am obviously interested in joining any effort to try to recover small investors' fund.
I do not know how bankruptcy cases are handled in Japan, but - obviously - as a group of small investors - we need the help of a Japanese law firm.
The goal of filing bankruptcy is to protect the filer from debtors to either:
- give him time to recover from his losses without paying his debts for a while, or
- liquidate assets and distribute proceeds between debtors (each gets a percentage of his losses).

Again, I do not know how bankruptcy is handled in Japan, but in the USA, bankruptcy is handled by a Federal court, which has a higher authority than local smaller courts. So if a group of debtors sues the bankrupt person/firm in a small court, the judge will not be able to do anything, because the bankruptcy filer is protected by whatever order was issued by the higher court, So if the higher court ordered certain debts to be forfeited, no action in a lower court can reverse that.

Unless there was criminal intent on the part of Karpeles... that's a whole different story.

How about we compile a list of our email addresses, so that when a collective decision has been made of what to do (what law firm in Japan to represent all of us for example), we can all proceed as one (in USA, that would be a class action suit).

If http://www.mtgoxrecovery.com/ is legitimate, serious and will agree to represent us on the basis of getting paid only by a percentage of money recovered, then how about we go with them, to represent us all?