I posted 2 weeks ago that COD4 is the best selling shooter in history.
PC 8m
xbox 360 7.5m
ps3 4.5
=20million and still selling, Keep in mind that this game came out (2years ago) with half the user base that there is now.
Now when modern warfare 2 comes out in november i have no doubt that it will outsell cod4, Everyone i know is going to buy it day1.
this is my good guess
pc 10m
xbox 360 9m
ps3 6m
=25m
first day sales for modern warfare 2 will be 2.5m on all platforms.







