These paintbrushes by Don Lee seem like an incredible idea. Called the Nomad Brush, each brush’s bristles are made of conductive fibers, so that it’ll work for painting on the iPad with any paint tool app.
I’m not sure I entirely see the point though. The iPad’s touch display can only register ten touch points at once, with none of the granularity that would be required to capture individual bristle strokes, not just brush strokes. Consequently, a lot of the feel and look of painting with a brush will be lost, especially since the iPad’s display doesn’t register pressure: you might as well use any rubber-tipped stylus instead for roughly the same effect.
Ultimately, it seems like whether or not the Nomad Brush is worth the dosh for you is how much more comfortable you are painting than drawing. If that sounds like you, the Nomad should be out in February.