I guess that's somewhere around 100M units in 6 years. I still remember when they started selling them. Back then all the Fry's Electronics stores were Incredible Universes owned by the Tandy Corporation. The 360 launch looked tame to the lines I remember when they started selling it.
I wonder what a launch comparison of the 360 and PS2 would look like? 10:1 purchases?
Anyway... 100 Million
a massive record breaker the 360 will never live to see.