Hi,
I'm not so sure that a dedicated appliance or Torpark-on-USB is going to help with the confiscation issue. When the police come in, they take *everything*. They're not going to say "Oh look, it's Torpark on USB, let's just take the USB drive." They'll take the whole system.
Or if you have only one machine (the one with Tor) at one place.
bye, Matej