Facebook recently announced a new partnership with Bing. Bing will now pull in Facebook "Like" information into their search result pages creating "social search". Social search will take the personal link recommendations from your group of Facebook friends and include those links within a special section of the search engine results page. In the future Bing will look to add your friend's "Likes" next to the individual search engine result listings. Bing will also be providing a "Friend Finder" that will display people that you should friend based on your Facebook social network of friends.
Here is a screenshot from Bing displaying their social search results:
Here is another screenshot of their Facebook friends recommendation with their social search results.
A sticking point for Facebook recently is privacy. Bing mentions that only content which is designated "public" and linked to by a person's Facebook friends will be displayed in their social search results. Bing also notes that the social search results are currently being rolled out only in the United States with full features expected over the next couple of weeks.