I'm sure that someone was making, or made a stylus that plugs into the mic input of a tablet, then uses that to transmit the touch pressure. This might have been on the Nintendo DS, but it's a novel idea I think - wish someone would make an iPad version. I wish someone would make a decent stylus as well - imagine having a wacom style stylus with touch sensitivity, through mic input or bluetooth or anything. Art packages on the iPad would benefit hugely. The only stylus I've seen use capacitive material and a fat blister on the end - not exactly accurate enough for art. If we had a real stylus, we'd have neat little intuos style art tablets, would be awesome.
The accel method is probably not ideal for an art package, it's more for Garageband drums and stuff like that - unless you paint like a mad man, bashing the screen - typically an art package won't be bashed enough to really register on the accelorometer.
As a stand-in, I'd maybe have a sliding bar for pressure, so at least the user can specify the pressure with their other hand - with some practice it might work out alright... better than nothing.
I got a fever, and the only prescription, is more memes.
