People here are underestimating how many HD-DVD and Blu-ray players came on the market in late Nov/Dec. Prior to that point, the number of HD-DVD units was close to 50-70k and the number of Blu-ray players was much lower than that. Then you need to add the liquations of the 1st generation HD-DVD players, the A2's, and the add-ons. I think it's pretty arguable the number of players for the 21st week was 200kish for HD-DVD. On the blu-ray side, of course, you have the PS3 coming on line.
Hence, I think probably each weeks sales equals Nov sales at this point. The volume is probably pretty darn large.