"Microsoft created "Bing Social" service on Bing search engine to aggregate tweets, Twitter trends and the top links being shared at any given moment by users of Facebook." Yusuf Mehdi, noted in his demo that Bing's presentation of Facebook shared links won't identify individual Facebook users who're doing the sharing, but it'll provide a unique glimpse into the things that users of social network consider worth sharing. Mehdi said he expects the feature to help differentiate Bing competitively.
As part of Mehdi's demo, the new Bing Social section was shown as a tab that people would be able to browse to after searching for a particular term.
More Info: Bing Social