The US gap for black friday will be 2:1.
It may actually grow further for december when the casual buying kicks into high gear and the undiscounted price will be a major factor. A 2.5:1 in December is a possiblity.
In "Others" we'll see a 1.5:1 ratio through the holidays and in Japan about a 1:1 from now till the end of the year.
All together I think the ratio will be around 1.65:1 for the 360.
Prediction made on 11/1/2008:
Q4 2008: 27M xbox LTD, 20M PS3 LTD . 2009 sales: 11M xbox, 9M PS3







