Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I have a Pogo, which isn't bad... but I'd like something with a narrower tip.

I use the edge of the Pogo to some success fairly often, not sure how large of a contact point the screen needs.
 
Next time UPS comes by, ask to use one of their brown 'pens' they use to sign their DIAD with. Maybe that will work?
 
Looks cool to use with any of the painting programs on the ipad, like brushes. You could feel almost like you are actually painting because it actually has a brush on the end of it.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.