I have Panther (7B80) installed on my iBook 600 and find that it's noticeably quite faster. I simply can't afford to install it on my dual 1.4 since it's my production machine. Won't even install it on Oct. 24th because my setup runs so smoothly as is.
But I know there are bold people in here. Pioneering dudes and dudettes...is one of you already running the GM version of Panther and FCP4 on their PowerMac (G4, G5)? Just curious about performance and/or stability of your setup.