I'm sure some other people saw this on Slashdot today (or on Engadget or AVS Forum last week): a link to the Comcast HD Quality Reduction: Details, Screenshots
thread on AVS forums.
Those screenshots are ridiculous. That gross macroblocking makes a mockery of supposed "HD" content. For anyone worried about "HD Lite" on satellite, if this is the future of HD cable, I'd take lower-resolution MPEG4 satellite HD Lite over full-res recompressed MPEG2 that looks like it was put through a mosaic filter. Gross.