www.edge.org Praised by everyone from the Guardian, Prospect magazine, Wired, the New York Times and BBC Radio 4, Edge is an online collective of deep thinkers. The nonprofit foundation was established in 1988 as an outgrowth of Manhattan's Reality Club, with the mandate to "promote inquiry into and discussion of intellectual, philosophical, artistic and literary issues, as well as to work for the intellectual and social achievement of society". As the site brags, their contributors aren't on the frontier, they are the frontier. Thus you can hear from the likes of Esther Dyson and Bill Gates, as well as a host of lesser-known, but no less incisive commentators. Edge are the people who publish the Dangerous Idea titles, and their site is no less thought provoking. There are, however, a lot of adverts down the side for books, which you'll either find distracting or enticing.