There never was a keyboard that was sold as a "TrackPoint III Keyboard", although confusingly, the 104-key rubber dome TrackPoint IV keyboard was actually a TrackPoint III. (Well, it had TrackPoint IV-like drivers, so I'll call it a TrackPoint 3.5.)
(There are two differences between a TrackPoint III and a TrackPoint IV - the TrackPoint IV has a third mouse button, and the drivers for the TP4 allow scrolling or a magnifying glass to be called up when that third mouse button is held down. The TrackPoint IV Keyboard only had two buttons, but came with drivers that gave it TP4-like capabilities when the shift key was held down.)
