Crayola iMarker for grown-ups?

Having recently purchased a Wacom Bamboo stylus for use with sketching and note taking apps on my iPad, I was wondering if anyone knows of an iMarker type stylus (and associated app) for grown ups?

http://www.griffintechnology.com/crayola-colorstudiohd

It appears that you can set the ColorStudioHD app to distinguish between input from the iMarker and fingers (quite useful when you need to rest your hand on the screen when drawing..!).

Any ideas?

Hmm..., good concept, but rubbish execution... hopefully they will bring out a better version soon, as well as a more elegant one for adults - I don't really want to use a thick glowing humming crayola marker in meetings at work.

Fair enough - think the tech needs to mature a bit...!