We already got a look at Microsoft's little XNA show-and-tell as relates to Windows Phone 7 Series, but our colleague Andrew Yoon over at Joystiq had a chance for longer sit-down with Xbox Live general manager Ron Pessner and XNA Game Studio manager Michael Klucher at GDC today, and he's been kind enough to share the interview with us. The main topic of conversation was the company's plans regarding Xbox LIve and, specifically, how it would be integrating it into Windows Phone 7 Series. And believe us, there was plenty to discuss -- including the sweet science of porting games from Zune HD to 7 Series phones ("it's 90, 95 percent code reuse... in an hour or couple of hours, we're taking games that were written for Zune HD and putting them on the phone"), the importance of maintaining a consistent gameplay experience amongst different hardware, and the reasoning behind limiting devices to asynchronous multiplayer. What are you waiting for? Hit the source link to embark on this miraculous journey of discovery.