I was also rather disappointed - and even a little confused - at the lack of driver support.
First off, Win2K seemed to do a smashing job of detecting all of my hardware. It seemed to have drivers for everything - except the Kensington. Come on....
But more of a disappointment is Kensington's apparent lack of effort with regards to developing new drivers. It's not as if this was a surprise to them. Not what I have come to expect from them - I've usually been quite happy with both their products and service for the last several years.
Lastly, I definitely must agree with you regarding the standard PS/2 drivers.. it just ain't the same!
-Dave