Do you really need a digitizer? Quite a few artistic people I know are fine with a "capacitively detectable stylus". It doesn't have 1024 pressure levels (or however much the wacom or whatever on the surface does). The accuracy of some touch screens (most notably the ipad) seems to be sufficient unless you require a real pressure sensitive surface.

Ok, poll: how many of you really want a digitizer (and have ever used one for more than a few minutes)?