Twitter co-founder Biz Stone's Jelly project has been shrouded in mystery for months. Is it a social network? A distributed computing hivemind? As it turns out, Jelly isn't anything quite so special -- but it's worth checking out all the same. The newly unveiled service expands on Quora's basic concept, drawing on the collective wisdom of Facebook, Twitter and Jelly itself to both answer questions and identify objects in photos. If you're stumped, you can forward questions to just about anyone. Jelly's Android and iOS apps are available today, so it won't take much to learn whether or not it's worth the wait.