I found a link to some people trying to raise money to manufacture a really cool iPad paintbrush on a site called Kickstarter. Looks like Kickstarter is a way to get "pledges" to fund creative projects. You are not really investing but by pledging you get some of the products they are trying to build as a thank you. Looks like a pretty neat platform done well.
Here's the iPad paintbrush link that led me to it.
http://www.kickstarter.com/projects/...ce-on-your-ipa