Hi, I work for the DMS, specifically the CTD, and we've been authorized by the DMSEDWWSOE to confiscate all of your belongings and hold you indefinitely while we conduct further investigations. You have the right to piss your pants.
have a "panic" button (destroys your hard drive), and keep a backup of your wallet on a remote server.
there are people that have implemented that, especially those that are involved in highly illegal works on the internet (no, i don't mean cp, get your mind out of the gutter).
even better - truecrypt your hard drive, don't cache passwords (of course), and pull the plug when you see the feds pull up. that way, unless we're in a total police state, you should *eventually* get your stuff back.
truecrypt has a huge vulnerability: YOU. think "enhanced interrogation techniques"