Linux Virtual Privacy Machine

MetroPipe: "Carry your entire Internet communication system on a tiny USB drive. Contains a complete virtual Linux machine with privacy-enabled Open Source Internet applications. Carry your Internet applications, email, bookmarks, history, web cookies, download files in your pocket."

UPDATE: I tried this out and it certainly has promise. The best I can describe it is that it's a mini "virtual" machine that can run on Windows or Linux to emulate a complete Linux environment. Performance is a problem on less than up-to-date machines. It is secure because all interaction with the internet (email, browsing, etc) is done within the confines of this "virtual" environment. I predict we'll see more work along these lines. Imagine a Knoppix you could run as a task instead of needing to boot into it...