Well, Netpad is the best I've heard in this thread, but I'm partial to handtop, so I'll throw it out there. It beats palmtop because it avoids confusion with Palm and with the HP200-like platforms last known as palmtops. It's also more accurate; a Palm (or other typical PDA) does get held in your palm, but an IT (or Pandora/200LX/etc.) doesn't really. And it does a pretty decent job of conveying the laptopiness, i.e. it's a general-purpose computer. Of course, I am wont to characterize it more brutishly as "a pocketable laptop", with way too many syllables.

In all fairness, NT is not really a CP/M derivative; it's a crock unto itself, but not that one. (And unless I'm quite mistaken, Origami/UMPC was all about NT5.1 (and later).)
That's more or less the whole PDA concept, which (at present) the tablets aren't so hot at. Fortunately, I don't want a friend/alter ego/assistant; I want a workbench for tinkering, and that way the N800 makes me quite happy.