I've been using Fujitsu Stylistic and various other Windows Pen Computers / Tablet PCs since buying an NCR-3125 longer ago than I care to remember.
Using a SSD and long-life battery really transforms the experience of using them.
Unfortunately, Axiotron never made their Pro model, but the ModBook is pretty close:
http://www.axiotron.com/index.php?id=techspecs
(1280 x 800 display)
If you didn't want to use Mac OS X, one can install Windows pretty easily.
Or there's the new ThinkPad X201T:
http://www.tabletpcbuzz.com/showthre...1t-full-review
(again, 1280 x 800 display though --- it's also a convertible)
William