This is a pretty decent taxi driver simulation game built on top of Bing Maps. The aim of the game is to pick up and drop off passengers in and around Vancouver, Canada.
The game itself is very impressive but what is even more wonderful is that the developers have made the source files for the game freely available. So if you want to build something similar yourself just download the files and get to work.
If that sounds too much like hard work then just play the game!