Tasty crypto information follows. One of my favourite things mentioned: n-stage crypto keys. So you could have some wacky things like a network key, a disk based key, a password, and another key on a crypto partition that only opens up at certain times.
Keey your stuff secret if you want, but the really nice thing is that you could do this on a laptop and have it so that if the laptop is stolen, all that critical credit card information and pictures of your spouse aren't usable by *anyone*. Also, would kind of eliminate what happened on the National Lampoon's European Vacation, with the video camera..... hint hint.