I'm planning on getting one of these in a few weeks:

http://computers.shop.ebay.com/PC-Laptops-Netbooks-/177/i.html?_nkw=Compaq+TC1100&_catref=1&_dmpt=Laptop_Adapters_Chargers&_fln=1&_sc=1&_sop=1&_trksid=p3286.c0.m282

It doesn't use the typical Intel graphics chip, it has an NVidia GeForce 4 Go 420 32MB chip, so it should be okay for lite sketching and some 3D work on the go.

On another forum an ArtRage user said he's used this tablet with ArtRage and MoI successfully.