The middle button was added to placate my obsession with a second pointing device. We showed that you could use the middle button to accomplish what all my two

The middle button was added to placate my obsession with a second pointing device. We showed that you could use the middle button to accomplish what all my two TrackPoint prototypes did... they went for it... but ... i am sorry to say ... the scrolling consistency and control somehow (still) gets hijacked by Windows in some ways ... it should be revisited.