Some probably already know about this, but last night I was reading Sound & Vision at Barnes & Noble and somewhere in there someone asked about video calibration discs for the HD formats. The S&V writer replied that some companies are working on them but he also said - if I'm remembering this correctly - that on Sony's Blu-Ray discs they have included a series of test screens. These can be accessed by pushing 7669 then "enter" (that number is "Sony" in number pad form). He didn't say whether this should be entered while the disc was playing or when a certain menu was onscreen, etc.