Fun With Maps: Solar Roofs of San Francisco

What do you get when you mash up Greener Than Thou with Google Maps? Probably something like San Francisco Solar Map. Like last week's RoofRay, the site calculates your solar potential, but the satellite-view map also plots all the solar roofs in the city, so you can feel smug because you have the only solar roof in the Western Addition. Or curse your neighbors for making you only the fifth one to go solar. [SF Solar Map, via TreeHugger]