Drivers for Logitech QuickCam Orbit AF: Any third-party options?
First thing I'd try would be Macam. Your camera is listed as 'it depends (UVC)' on the supported list, which suggests it's getting most of its functionality from the built-in UVC driver anyway. But it's free, so you've nothing to lose by trying it...

EDIT: Scratch that. The details page for your camera says it doesn't yet work with Macam at all, only with the built-in UVC driver.