Nine years ago eccentric engineer Dean Kamen unveiled the Segway Human Transporter (HT) — a gyro-stabilized, two-wheeled scooter that he claimed would transform personal transportation. His promise and self assuredness echoed that of Henry Ford about the Model T. But Kamen may have exaggerated. Even in a crowded and wealthy (the HT costs around $3,000) metropolis like Manhattan, you seldom hear the HT’s electric buzz. And though company financials are hard to come by, it seems clear that Segway sales are not living up to the hype. This New Yorker remains intrigued.