MojoPac - Turn Any USB Device into a MojoPac PC

With the MojoPac software, you have the control to turn any USB 2.0 device – thumb drives, hard drives, iPod – into your personal MojoPac PC with all of your applications.
The MojoPac lets you build a virtual computer that you can take anywhere, together with all your applications and preferences. This software isn’t 100% bug-free and you will experience some unusual behavior and crashes, but it works well.
No matter what computer you use, it will leave absolutely no traces of your activity. That means no one can see your applications, browser history, or anything else about your computer usage. It is a Windows XP only product and the current price is $25, though in a few weeks that will jump up to $50.