In a recent column on GOOD, Cliff Kuang discussed how "augmented reality" phone applications could make using public transportation much, much easier. Here's a powerful example: the New York Nearest Subway app from acrossair.[youtube]http://www.youtube.com/watch?v=cH6r2tIaRXUAnd here's a quick related note. People have been talking about Moore's law and the accelerating pace of technological progress for years, but now it's getting palpable. The iPhone itself is only two years old; awareness of augmented reality didn't hit the public until this winter; and now, only six months later, we have a pretty awesome exampe of AR. We're in for a crazy ride.