After several months of waiting, my ZZ9000 RTG card finally arrived in my grubby little hands.
Installation was smooth and I was happily computing in 1280x1024 in no time. The issue I'm having seems relatively widespread - the 256mb of Fast RAM is not detected on cold boot, but doing the 3-finger salute fixes this.
I know some of you have a ZZ9000, what workaround have you implemented on your system?