Here we go then, driver and short story here
http://www.binarydevotion.com/?p=213If I remember rightly it was quite a CPU hog so play with the priority as appropriate. Try the different modes too, as the tablet is quite jittery so I tried to model the effect of the pointer being attracted to the tablet coordinates by a spring (high initial acceleration getting slower), "gravity" (the tablet coordinates were "downhill" and the pointer would roll towards them) and filtered. I think. Need to reinstall my Amiga to check all this

I should probably rewrite this with better knowledge... but this works.