You know how you can drag your route around when you get driving directions on Google maps. I think it would be a neat idea if they tracked how users changed their routes, and then used that to improve their directions. People change routes to account for traffic, times of day, stop lights, closed roads, etc and Googles algorithm probably doesn't know about those things right now when generating directions. It really would revolutionize directions.
What say you, Slashdot?