Which QuickCam do you have? Not too long after I bought mine, Logitech announced they would stop supporting it, even in OS 9. Mine still managed to work in OS 9 (although I haven't tried it in 9.2.1) even though I've heard numerous reports of it not working. I've long since given up expecting drivers for OS X, and am now looking longingly at a FireWire iBot. I believe they plan on having OS X support eventually, if they don't already.
I had been waiting for something to make my camera work. I saw several people post saying that their Firewire Pyro webcams worked in OS X. Well, I went out and got one. And gues what... IT DIDN'T WORK! heh.
Well, I was annoyed, but figured that drivers would eventually come out.
Well, just recently, I saw that something called DCam WebCam driver came out. So, I downloaded it and gave it a shot, and suddenly all the webcam apps are seeing the camera and working.. one Video conferencing app was crashing the chat window when the camera was hooked up tho. Not sure if that is a bug in the driver or the app itself. I'm suspecting it's the app.