paul, I know ATI has a mobile chipset
However, iirc it is fairly old and manufactured on 180nm or worse. (?)
They could probably sell twice of the volume with a state-of-the-art chipset on 130nm plus probably sell more and/or combine it with mobile GPU they announced recently.
As Barton will make a great Mobile-CPU, ATI sure could sell it long enough to make it good business.
K.