Sadly they don't seem to have a box art for Defcon yet on the system (I presume it works in the same way as CDDB but for programs it recognises as games):

Maybe since Introversion and Microsoft seem to be quite chummy at the moment you could arrange for Microsoft to add the Defcon box art?

Also not wanting to sound like an advert for Vista here (so just to inform you, getting even "compatable" games to run on it is horrendously difficult) but for all those moaning about wanting a way to remove the music from Defcon, theres now a mixer feature to the sound controls so you can reduce the output levels for certain programs. Now I can listen to podcasts as the world ends with ease.
