In case you missed Thorsten Heins keynote yesterday, RIM's betting on BB10 becoming the next big thing in mobile computing. Part of Thorsten's plan to put BB10 on top involves deep integration of third party social apps like Twitter, Facebook and Foursquare into the new OS. BlackBerry has always been a productivity platform first and foremost, but with RIM touting BB10's abilities as a social platform, we wanted to know more about the plan to make it happen. So, we sat down with T.A. McCann, RIM's VP of BBM and Social Communities, to find out how he's going to reach his CEO's goal of a flowing, social OS and the challenges of getting there.