If you want to push your luck, have a look at the 177.72 beta drivers (from Guru3d) - I'm trying to tell myself that I'm seeing things that I want to see, but gee they look good.

Also, YCbCr4
22 is now an output option - can't get it to work with my LCD (which should support it) yet, but it shows they are putting in some work on them.
Justin