The Cosmonaut stylus

The Cosmonaut stylus seems quite promising, I think (the same people made the Glif). It's based on the simple idea that you don't draw on a tablet like you do on paper, you draw like you do on a white-board (not resting the hand on it, and with freer movements), so the pen should be designed accordingly.

It's also interesting to follow the amount of troubles and delays they've had making this seemingly simple object, it makes one appreciate why it's difficult to make a good smartphone or tablet.