I have many Logitech Products, eg. several MX 500, the diNovo Media Desktop Set Bluetooth, most of its buttons work on a Mac although Logitech says its not for Mac, and they refuse to make at least the mouse more recognizable, although the System Profiler easily recognizes it. However the Logitech Control Center in System Preferences does NOT.
I’m using a Cube 800 MHz and 10.4.7 and have had no problems with LCC 2.1. I was able to configure several of the MX 500 buttons e.g. with the new internet search or speed scroll.
(By the way, the only two Logitech Webcams that work with OSX and iChat are Quickcam 4000, and the rounded QuickCamPro for Notebooks, the subsequent models of these two do not).