Not to steal his thunder, but Stormbind's idea sounds very fruitful, in that it is one of the solutions with the widest range of hardware it can function on. You can go grab a 1GB thumbdrive for $100 if you shop around (some of those "price watch" sites are amazing help), and and then experiment with any USB laptop. You'd have to get creative, by trying to get the hard drive to boot the minor stuff that allows you to use an OS from the thumbdrive. This should be an interesting project ... until it becomes an industry standard way of making a rugged laptop, which will make it a commodity.