I expect to pursue relief via legal channels if/when Mt. Gox folds and/or if Mt. Gox remains operation but refuses to take action on my request for a sufficient duration. I am, however, not a legal expert and do not know the appropriate questions to ask in an attempt to collect information for future action.
What do you consider to be a "sufficient duration"?
Basic rule of collection: "The longer you wait, the less likely you are to get the money owed to you." When a business gets 90 days behind in their payments, they're probably never going to pay without coercion. Mt. Gox announced their "temporary hiatus" on June 20, 2013. Today is September 14, 2013 - day 86.
There are lots of options. For amounts up to $10,000, you can sue in Small Claims Court in Delaware. Mt. Gox, to comply with FinCen rules, has a nominal "office" in Delaware for service of process. That makes them subject to U.S. law. You can file a complaint with the US Securities and Exchange Commission, on the grounds that Mt. Gox is acting as an unlicensed broker/dealer in the US. You can get advice on collection of debts in Tokyo from the Japan External Trade Organization, and they can tell you how to file a complaint with the Japan Financial Services Agency.
You can do all of those things simultaneously. Once you start to apply pressure like that, you usually get paid.
Mt. Gox is in Japan, which is a major trading partner with the US. Financial disputes come up all the time, and they're routinely resolved. The US SEC and the Japan FSA talk to each other; they even have a formal cooperation agreement. It's not Romania.
To answer your question, 'sufficient duration' is currently a quarter or two for me, but it depends more on how interesting the problem is to me relative to other unrelated adventures.
'Getting my money back' is not the driving force. Any money I put on anything Bitcoin related is considered a likely full loss by me and certainly something I can live without. That said, I don't like to get fucked. If the government and/or Peter Vessenes have stolen from Mt. Gox and that is the reason Mt. Gox is not paying me promptly, these parties are effectively stealing from me and I'll be interested in extracting revenge.
As I've said before, the attacks which Mt. Gox has suffered have resulted in my placing a higher degree of confidence in them and led me to believe that they are a net positive in the Bitcoin ecosystem. Not insofar as that I won't lose money through them, but more that it provides evidence that Mt. Gox is NOT fully in bed with surveillance apparatus and part of a general state sponsored honeypot operation.
The tag-team efforts of the US legal system, financial system, and Coinlabs makes me suspicious that playing a role in a honeypot effort was Coinlabs game, and I'm glad that Mt. Gox deferred from handing their books (sensitive customer data) off to Coinlabs and will be interested to see more as this situation evolves. Back to my initial point, I would be even more glad if I could provoke some insight into the goings on on the basis of my financial loss. I'm due to write my first note to Mt. Gox and still struggling to figure out the best questions to ask geared toward accumulating information needed to eventually probe various entities further.