benfrog writes "Microsoft just quietly launched so.cl in an experiment to more closely unite web searches and social networking. It's not intended as a stand-alone social network — users can log in with Facebook or Windows Live IDs, and it will share your searches publicly by default. "As students work together, they often search for the same items, and discover new shared interests by sharing links. We see this trend today on many social networks, such as Twitter, where shared links spread virally and amplify popular content. So.cl experiments with this concept by automatically sharing links as you search." They've also (wisely?) put Bing Search at the center of the site."