Gas Price Temperature Map

This is really quite interesting, and a great example of how thousands of data points can be displayed to quickly convey information. The USA National Gas Temperature Map displays the price for a gallon of gasoline across the country, and is searchable by city, state, or zip. Update times are listed at the bottom of the map.

You can zoom in and see gas prices down to the zip code level and further to the individual gas stations. It's a fun tool, informative, and easy to use. What other indicators could we be displaying in this manner?

(Hat tip: Information Aesthetics)