Anyone using a stylus for the iPad?

With the release of the Paper app, using a stylus has started to intrigue me. I'd like to be able to draw on the iPad and using my finger just isn't cutting it. I realize that none of the current stylii are pressure sensitive, but that doesn't matter to me right now.

Also, I stumbled across this video while doing some tennis shoe research:

Seems as if he's using this stylus with the iPad for design:

Anyway, just wanted to get people's experiences and maybe find some recommendations for stylii and apps that work well with them.