Woow!!Today facebook has launched its beta phase graph search. With Graph Search, you simply enter phrases such as "My friends who live in Ghaziabad," "Photos of my family taken in Kanpur," or "Dentists my friends like," and Facebook quickly displays a page of the content you've requested.
In Facebook's early days, people could search for basic things like friends, groups, and events, but the systems that powered these searches weren't comprehensive, nor were they able to scale with the site's growth.