Problem: Styluses (styli?) feel weird when writing or drawing on an iPad because the screen doesn't feel like using a pen and paper; There's not enough friction. Studio Neat aims to solve this problem with The Cosmonaut, a stylus with the feel of a dry-erase marker. If the project gets out of Kickstarter phase and goes into production, it'll retail for $25.
This video demo of The Cosmonaut shows a prototype in use with Draft, 37signals' straightforward sketch app for iPad.
Draft is also featured in the "cover" shot at this Fast Company story about the stylus. If you want one, get on board at Kickstarter.