I don't think you'll see any discs specially coded for Audyssey DSX. What you WILL see are discs with Dolby Digital Surround EX or DTS Neo:X, the movies Dredd and Expendables 2 being the first of them. These are 7.1 DTS HD MA discreet that are specially mixed to support DTS Neo:X, which ids derived from the 7.1 track.
Audyssey DSX is just Audyssey's take on matrixing 5.1 material to 7.1, 9.1, and 11.1 surround. I only use Audyssey DSX for material with less than 5.1 discreet audio. For anything above that, I use the respective Dolby Digital or DTS surround modes, both of which have their Height and Wide counterparts to DSX, namely ProLogic IIx and Neo:X
My Denon receiver has a surround mode called " DSX, PL IIx, Neo;X " which will look at the incoming stream and pick the appropriate processing. Most of the time it favors DSX, so I have to choose one of the DTS or DD modes to lock it to one of the two.
HD-DVD = 94
Blu-Ray = 120 ( 24 Warner red2blu )