good idea
but it could use a TON of features! like, the ability to share the drawings in maybe a pub or something, a simple 'undo' and 'redo' buttons, an 'eraser'-like something so we wouldn't always have to pick a black-colored, high-powered... drawing... device. also, a nicer-looking interface would really improve this, as the buttons get in the way of the canvas. these little improvements aren't too hard to implement, right? anyway, a fun little gadget. :D