Ubuntu Linux 6.10 on the Panasonic Toughbook CF-18 Tablet PC
I recently installed Ubuntu 6.10 on the Panasonic Toughbook CF-18 Tablet PC (model CF-18FDHZBVE) that I had previously installed Ubuntu 5.10 on (you can find that writeup here). This model comes in two versions - one with a touchscreen (i.e. you can use your finger) and one with an active digitizer (i.e. you need the pen). The digitizer model is the one in this article.
And here is the proof of the pudding - using the digitizer to sketch in GIMP: