@Anonymous: the missing OpenGL functions, which resulted in weird artifacts in Wine games (I bet you're referring to the whited out indoor minimap and mixed p icons in World of Warcraft) were solved in Catalyst 9.8.
They were not actually missing (calling for them worked) but were unadvertized by the driver - and since Wine will implement workarounds for as many missing extensions as possible, WoW on Wine on Ati cards was hell.
Until 9.8, which solved _all_ graphical bugs on Ati hardware (I have a HD4850), whether in OpenGL or DirectX mode and improved performance a great deal: you can now go around Dalaran at >20fps in OGL mode.
You still can't really raid effectively though.