MIT student Ben Fry has developed a very cool ZIP code map that lets you view the area assigned to each number of your ZIP code (3-7-2-0-9, for example). It looks like a star-filled night sky shaped like the United States. Click once on the map and then type in your ZIP code one digit at a time and watch it zero in on your homebase. It won’t reveal your rooftop or anything, but it is interesting to see how ZIP codes fit together. If you’re looking for a little perspective, hit 372 (the Nashville area) and zoom in.