I will have to try a Kinesis, then! If the 4000 is finished, how about some pron^h photos? Congratulations!
I wasn't referring to the 4000's middile-scroll, which I wish that I could get working in Linux. I am referring to an actual trackpad, that I have mounted below the spacebar (where the lamps are on a stock 4000). You might want to add one, it is great for the times when you need to move the pointing device just a little. For real pointing, though, I prefer a vertical mouse.