Hunch, a new site from Flickr cofounder Caterina Fake, has just opened its doors to all comers. You might describe it as a sort of mashup of Yahoo Answers, Wikipedia, and any Facebook quiz that helps you determine stuff like just who your favorite member of the Three Stooges is. Except that wouldn’t come anywhere near adequately conveying how clever and distinctive this decision-making tool is. Or how outstandingly good its user interface is.