Now comes word that Segway is working on a 4-wheel version of its Human Transporter. This is where things really get hairy for pedestrians. I can't see any way that this beast won't be more of a hazard than the two-wheeled Segway. The two-wheeled model just seemed to have something about it that suggested it would sort of bounce off of the accidental collision with a pedestrian. But a 4-wheeler looks like it would bowl the poor walker over. With the disabled community rallying around the Segway, look for more legislative and legal fireworks.