In Windows Phone 8.1 we delivered broader developer integration endpoints in the operating system. Developers can now deliver applications that plug into several aspects of the People Hub. In this short video, Cliff and I walked through the three new specific extensibility points. Here are some links for more detail: Cliff's blog on Social Extensibility in Windows Phone 8.1 Official Documentation on Social Extensibility in Windows Phone: Integrating with the Me card in a Windows Phone Silverlight 8.1 appImplementing contact bindings in a Windows Phone Silverlight 8.1 appImplementing online media extensibility in a Windows Phone Silverlight 8.1 appJeff Wilcox's source for a stub application to register an existing app as a Me card integration target (github) Please let us know if you have any questions! LL @larryalieberman