Bing Social yesterday announced a new feature called People Recommendations to help searchers discover new Twitterers. Based on a search query, the feature is designed to also return "recommended" users on Twitter. Those users receive rankings, such as "Influential" or "Popular." So a Bing search for [ search engine ] returns @SEWatch as influential. Though it obviously isn't perfect, as it returns @funnyhumour for some reason as a popular source for search engines.