Building a mechanized LEGO race has been on my mind for a long time. A very long time. When I was a kid, I saw a model of a town in some store (possibly Pewex) with cars glued to a rubber band. It was spinning around and simulating traffic.
Check out full video on YouTube: https://www.youtube.com/watch?v=BVHqaJEVBLU
High resolution images and full original post on the LEGO Blog: bricks.kalais.net/post126