Is there any question map mashups have gone serious? How about billions of dollars serious? The U.S. website Recovery.gov was built to make transparent the use of economic stimulus money. Now you can track every dollar on a map.
Before paintings hang in museums, the artists put brush to canvas out in the real world. A new site is looking to tie the two together with geocoded art. However, rather than show the location where you can see the artwork, it is instead mapped to the location depicted in the work.