One of the things artists who are interested in Tablet PCs are always interested in knowing is the degree of pressure sensitivity on the digitizer. The more degrees of sensitivity the better. Consequently, Tablet PCs without active digitizers aren’t the favorites of artists.
GBM Forum member JasonJ shows that you can do some pretty good work without an active digitizer, using an HP TX1314ca running Vista. He’s using the Open Source program GIMP. Check out the thread here.