Find food your friends like…Search across multiple sites, search by ingredients and search for what your friends like using your Facebook profile. This site is another example of using the ‘friend’ connection in search marketing…see snippet below from TechCrunch.
Search gets better because of your friends : TechCrunch Oct 2010
If you search for something, and your friends have previously ‘Liked’ a story that’s related, Bing will show you a box called “Liked by your Facebook friends”. Sometimes this module will show up at the top of the page, sometimes the bottom, and sometimes never, depending on how relevant Bing things it is.
Example: If you search for Steakhouse San Francisco, Bing will show the five nearest results. But if a friend has previously ‘Liked’ a steakhouse that’s not listed, then it will show that one as well.