From the Gothamist interview with Clay Shirky:

I was coming home in a cab from LGA in the pouring rain a few months ago, and sliding through a pool of water, we rear-ended the cab ahead of us. Both drivers got out, furious, and, before saying a word to one another, took out their phones and photographed each other's license plates.

It was the first use of a camera phone I'd seen that wasn't just for those "Hey! I'm drinking a margarita!" snapshots, and it convinced me that the unexpected uses of these things were going to be much more interesting than anything Nokia has dreamed of.

Streets, uses, things, &c.