Angus Norton, Senior Director, Live Search Product Management says :
Now Facebook users in the U.S. have the option to "Search Facebook" or "Search the Web." In addition, adCenter is delivering search ads alongside those results. For me that means getting great search results while receiving highly relevant ads that are personalized by either my Facebook profile or search query. Find out more about the Facebook team's first implementation of Live Search in their blog.
As we evaluate user feedback and results we'll explore additional ways to integrate Live Search more deeply into the Facebook experience.........Full Story At Source