This message only applies to Linux users of PyMOL. I have put together a general purpose reader for /dev/input/event* device files (eventio.py) that can be used from within pymol to interact with various input devices.
There are also some PyMOL extensions that use this python class. The following is a list of devices that can be used from within PyMOL with these additions: SGI or Alpha serial line dials Kensington Expert Mouse Pro Trackball (USB) Cirque SmartCat Touchpad (glidepoint) (USB) Any extra USB mouse. Everything can be found at: http://atb.slac.stanford.edu/~zac/pymol/ Some of the code in 3d_controller.py use functions that I still have to put on the web server... Have fun, Zac