Change a stoplight from red to green with the walk button:
The most popular hack, which works on most models, is the “Instant Walk.” Three short clicks, followed by two long, one short, two long, and three short; turn any crosswalk signal from “don’t walk” to “walk” with a matching change in the traffic signals.
I hate driving, and I think I’d be quick to kill myself before commuting on the freeway everyday to work, but this mashup of google maps and yahoo traffic is real neat.