PC Magazine has a good article on CPUs and roadmaps for the future. Its in the February 2003 issue.
According to it, AMD (and presumably Intel) will be going 90nm in 2004. Both companies will go to 65nm in 2005. And intel (presumably AMD also) will be moving to 45nm in 2007, and 32 in 2009.
Width in nm of the transistor is not the only thing to take into account when talking about power usage and heat.
When both companies move to 90nm, they will also be shrinking the gate and the dielectric, which serves as an insulator to prevent the current from leaking from the gate into the pipe.
No doubt even more changes will be made to additional components (ie gate, dielectric, source, drain) when both companies move to even smaller nm processes.
I dyed my body green, branded an "n" on my chest, and stood on a box in the middle of Time Square for 3 days shouting, "ATI is the Anti-Christ!" to boost sales after nVidia had a losing quarter.