Yeah, seems to be a PS/2-only option. The touchpad on my laptop is connected via a PS/2 interface, and it does have the sampling rate option. I remember setting it to 200 samples/sec when I first got the laptop itself.
On the other hand, the external mouse that I sometimes plug-in via USB (Microsoft IntelliMouse Optical) doesn't have the option.
EP, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS