I haven't tried the build in AGP yet, e.g. make it a module on the kernel side and not load it (or not make it at all) maybe worth a try, but with what you just posted below, it seems like they will only use their build in AGP driver, and no longer the kernel one? I surly hope that's not true.
No announcement yet.
[8.42.3] X1950Pro AGP vs 9500Pro AGP the winner? Clearly the 9500Pro! ... what?!