Facebook has announced a new feature to it search engine, called Graph Search, allowing users to make content and preferences more usable. “Users can type in queries like ‘who are my friends that live in San Francisco, ‘photos of my friends before 1980’ or ‘restaurants in Chicago,’ and the site will pull results from the vast store of posts and preferences uploaded by its users.”  Source: Facebook Radically Revamps Its Search Engine, by Brad Stone, Businessweek.com.