HM, Re: they can buy the A64 one that is faster (on most game benchmarks), lighter (8 pounds), thinner (1.7"), and cheaper ($3000)?!?!? That was my point.
But if you *really* want thin and light, the Centrino laptop from VoodooPC is 5.5lbs and 1.1" thick. Given that the video card will likely be the bottleneck in a laptop config, I doubt the performance in games would be much different between Athlon 64 1.8GHz or 2.0GHz and Centrino 1.7GHz.