[citation][nom]mihaimm[/nom]http://www.macworld.com/article/11 [...] undup.html[/citation]
I'm using the Bamboo stylus and it works pretty well. However, Apple built their touch interfaces for fingers from the ground up. The active digitizers allow for significantly more accurate touch input with a coordinating stylus, which would be ideal for notes.
My friend has the Eee Slate, and his notes look about 200-300% cleaner since it has a (Wacom, I believe) digitizer. Mine are all scribble thanks to the stupid chubby rubber tips.