http://www.kickstarter.comOne of my students brought this to my attention last night, and Shel's thread on the iPod Nano Wristband reminded me of it, because this website is exactly how that got funded
Basically you can submit a creative idea of some sort, set a specific budget needed to accomplish it, and people have something like 2 months to raise the money they think they need. People can pledge any amount and if the goal is reached, your credit card gets charged. If the pledges don't reach the goal, no one loses any money. The creator also has to specify rewards for the investors, which can range anywhere in price.
I thought it was cool! Gotta start thinking of ideas