I was lost in gadget reverie the other evening on the train, fiddling with a sleek new Palm Vx, when I felt a fellow commuter plop down next to me. He sat close--too close--so I looked up and saw a man in a suit leaning over me, peering at my screen. "Got any good games?" he asked. Then he whipped out his own Palm (some kind of III) and pointed it at me. No good games, I admitted, but I did have Vindigo, a real-time list of things to do in Manhattan. "Cool!" he said. "I've got a subway map. Want...
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