La collaborazione di Ms con Facebook è sempre più stretta.
L'SDK rilasciato consente di realizzare applicazioni Silverlight per Facebook.
This SDK combines the power of Web, client and social technologies to enable millions of developers to transform their imagination into next generation application experiences. We look forward to seeing the creative applications that developers will create for Facebook that will open up new avenues for users to share and connect with their friends.
maggiori info qui http://team.silverlight.net/announcement/announcing-the-new-microsoft-sdk-for-facebook-platform/