Vid of the conference though it doesn't have the 3rd party game developers part talking about the NGB and showing their presentations, still a good high quality vid:
Vid 1:
http://www.youtube.com/watch?v=jKsWSzAe5R4
Vid 2:
http://www.youtube.com/watch?v=0GLG71IouR8
Vid 3:
http://www.youtube.com/watch?v=x4AXgpTreEs