My framebuffer line looks like this:
ATY,AMD,RadeonFramebuffer@0 <class AtiFbStub, id 0x100000338, registered, matched, active, busy 0 (1965 ms), retain 8>
The only problems I am having with it is the slight chopping when dragging a large window to the vertical screen (I can live with this) and when maximizing chrome, the transition effect is also choppy. Not so when doing the same with Textmate for some reason. Maybe it is just a product of having such a large amount of screen realestate?
I just tried booting with Bulrushes and I got all black screens.