I really don't see AMD chips coming from fabs other than those owned and operated by Global Foundries. Once they're really up and running with both the Dresden fabs and the ones being built in New York Global Foundries will likely end up having the most advanced process tech outside of intel. Right now they have 300mm 65nm/45nm silicon on insulator running out of Fab 1, Fab 2 is being rebuilt to do 300mm 55nm/40nm bulk and both will be able to do 32nm in their respective wafer technologies in the future. I think the New York lines are going to start production with the 300mm 28nm bulk process wafers for GPUs.

Seeing AMD CPUs roll out of TSMC is not going to happen. First and foremost, TSMC doesn't have SOI wafers to my knowledge, they only do bulk. Second, both AMD and nVidia aren't that thrilled with TSMC at the moment due to their less than stellar 40nm process. I think it's definitely possible that you're going to see nVidia using Global Foundries, just because they'd no-doubt like a second source and also because of the troubles TSMC has had.