I was thinking about "pressure sensitivity" or "spray feature" in the painter module...
some programs (processing.org )have a pmouse feature (previous mouse position for X & Y).
If this feature is available in python, we could get the speed of the mouse...
and with this we could emulate a "pressure" or the witdh of a line...
EX:
If speed is LOW, draw a FAT line (or fat rect/oval/dot)
If speed is FAST draw a thin line ("...")
If speed is 0 the rect/oval becomes bigger and bigger
I will try to look forward on this option, in order to add something like a "spray can" button
i don't know if it's possible, i don't know if it's usefull but the chalenge seems interesting...
EDIT (18h44)
here is what i get right now
it's dirty but i think we could get something...
speed is increasing the width of the bezier line
i only tested the speed of X (not Y coordinates yet)