very cool tool

Check out the link above for an incredible tool that a professor just forwarded to us Ph.D. students. It combines Google mapping with the 2000 Census. You can click on a point on the map and get data for areas within one, three, and five miles of that point. By default it's set to Southern California, but you can move the map around (don't forget you can mess with the scale too) to get your desired place.