turned me onto the Maxtor OneTouch 4, and I must say it’s the most excellent external drive I’ve ever owned.
Though there are drives with much higher capacities than mine’s 120GB, the OneTouch is great for mobile users as it uses USB bus power to work, no stupid power cables to schlep around. In a perfect world, everything would have bus power, it’s cheaper, and easier, to operate.
It’s fast enough that I don’t suffer my applications chorking on data, and the thing is lightweight to the point I’m often unable to tell if I put it in my bag or not.
And you can get them cheap: they go for about $100, though I’ve seen them on sale as cheap as $74. If you’re looking for truly portable storage, this is what you want.