Yahoo has a contest site for makers called Make It Green. You can submit you own green DIY projects and the inventors chosen by the winner judges get "$2,500 and a share of the sales, and possibly appear on the Everyday Edisons TV show."
So far, 51 ideas have been submitted. My favorite idea so far is for a home mulch maker. I wish the site had more details about how it worked. It takes a lot of energy to chew up a tree and the wood chipper I bought a couple of years ago ended up choking on all but the puniest of branches when the blades became just a little dull.
