Due to the nature of the name / limited usefulness to others, I'd say much of its value would be determined by the amount and type of traffic it gets.
Consider putting up ads for services that help people find / clean / delete their on-line reputation - some of these services have affiliate programs, such as ReputationDefender. Testing such ads will give you a better idea as to the kind and quality of the traffic it's getting.
As for legal issues, don't sweat it...
Wikileaks encourages mirroring; don't seem concerned about domain names, since their .org, as of the other day, was still not resolving (it was not seized); from my understanding they chose to stop using it and are using a ccTLD version instead.
As for the U.S. government - in my view, they don't care - heck, they likely help "leak" the documents (none of them are truly "Top Secret"; most contain info that's already publicly available and/or widely known and/or obtainable via FOIA) to begin with; purposely allowing the site to operate - may sound crazy, but consider that the U.S. government was able to seize 80+ domains the other week for content pirating and counterfeiting, and yet doesn't seize Wikileaks - something doesn't jibe - imho, Wikileaks is a diversion / pretext for passing new strict laws governing the internet, but I digress.
Bottom line is the value is mostly going to be the traffic. Relating to that is that its traffic / utility could rapidly decline in the near future - can't say it will or won't, but that's a substantial risk a potential buyer will likely consider.
Good luck with the domain.
Ron