It looks like AMD won't be manufacturing any of its GPUs in the Dresden fabs anytime soon. FUD Zilla says this isn't likely to happen because AMD is unexperienced in this area and designing a GPU specifically for the Dresden fab could heavily affect the yields.
Currently the firm uses TSMC to manufacture the ATI GPUs and they do a pretty good job:
AMD/ATI is happy with TSMC as these guys know what are they doing and AMD needs Dresden to produce K10 and K8 CPUs. Once it gets K10 Barcelona and Agena out it will need all the capacities it can get to fill the channel.
Dell, HP and some other big sharks are waiting for Agena aka Phenom and Barcelona Aka Opteron 2200 as their Athlon sales is declining. More and more people are going for a Core 2 Duo as it’s a great CPU for a little money.