At the Office 2.0 conference, I met Paul Pluschkell, the CEO of Spigit. Spigit is a marketplace for ideas, reminiscent of a prediction market. But it's not quite one, since prices are set by an algorithm that takes more into account than just market demand. "It looks really complicated," I told Pluschkell. He told me that if I gave the site 5 minutes of concentration, it'd be crystal clear.
I gave it more time than that, and found the site very interesting. It's not what I would call clear, though.