Anandtech has done a pretty good report on using this disk. They evaluated nVidia, ATI (now part of AMD) using this disk. The disk has currently been given to reviewers, AV professionals, etc and is being duplicated in HD-DVD format, and will presumably be available for all like the earlier SD version. There will be a Blu-Ray version down the road.

See:

http://www.anandtech.com/video/showdoc.aspx?i=2923