I just today found the Asus R2H UPMC which wasn't mentioned here so far (at least I could not find a note) and could be a great SimPAD replacement!
Amongst its features:
* Intel Celeron M 900MHz
* WinXP Tablet (OEM) installed - but installing Linux is possible: http://www.xs4all.nl/~sozonko/asus_r2h_howto/
* 7'' Touch 480x800
* 768 MB RAM
* 60 GB HDD
* builtin GPS
* builtin Bluetooth and 802.11 b/g
* 1.3 Mpx camera
* SD port
* USB ports
* separate car charger available
* separate DVD drive available
And the IMHO good thing - it is already available since October or so. Price might be beyond what many of us can spend but appears reasonable compared to a Zaurus C3200 and real Tablet PCs: approx. 999 EUR
Here one of several reviews I have found:
Most reviews find that the system is quite slow and attribute that to the 900MHz CPU. But others point out that the WinXP installation is overloaded and contains all optional features. After thinning out it is much faster.
And, compared to a Zaurus it is of course thicker, larger and much heavier (900g). Battery operation time appears to be some 2-4 hours.
So, is there someone here on this list who already owns one?