The big knock on AMD's HD3D(their version of Nvidia's 3D Vision) tech up to this point has been the lack of Crossfire support(other than that it works great). That is about to change with Catalyst 12.1 after a year of waiting:
I was just over at the Tri-Def forums and a few people have confirmed that the preview driver for Catalyst 12.1 is working and they are able to Crossfire while in Stereo 3D in several game tests.
Coolness!
