Ohio is a Piano
Ohio has 88 counties. A piano has 88 keys. So obviously Ohio is a piano!
Well, it is on this amazing Google Maps for Flash API mashup. Cartogrammar has mapped each county to Ohio to a particular piano key depending on various data attributes. This means that you can play Ohio on this Google Map just as you would on a piano, except here you press the counties rather than tinkle the ivory.
The map has 'The Entertainer' and 'Beethoven's 5th' already programmed, so if you never learnt to play the Ohiophone you can just press play and sit back and listen. Alternatively, if you have always wondered what Google Driving Directions would sound like if each county you passed through played a different note (and come on who hasn't always wondered that), you can select a route from any county to any other county and listen to the route.
Hat's off to Andy Woodruff, the mad genius behind this Google Maps Mashup. I can't wait for the encore.