<http://schema.org/topics>
"facebook connect,Facebook,flixster,iBowl,iPhone,iPhone Apps,iPhone Resource Lists,Lists,live poker,Movies,tap tap revenge,Tech,UrbanSpoon,Zynga"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2009/03/31/facebook-conenct-iphone-apps/>