Engadget announces the availability of the TabletKiosk Sahara i440D Slate Tablet PC. Gottabemobile has a video review here.
What's particularly nice about the i440D is that it boasts both pen and touch. I haven't tried the new Sahara unit, but I think the dual digitizer is the way to go. Touch can provide quicker access to common operations, yet with the active digitizer also built in you don't lose the precision of the pen.