A Google Maps mashup that allows you to calculate the per-passenger greenhouse gas emissions created by a commercial airline flight between any two airports.
Environmental Working Groups interactive website and database makes it possible to see satellite images of the physical impacts of mining. The images show not only the impacts of existing mines, but where mining may occur in the future.
Useful mashup that lets you see who has been donating money to which political party by zip code. Good combination of raw data, charts and maps. Data source is The Fundrace Project.
