I should be a Google Earth Evangelist (it’s my favorite thing to demo these days) – this site offers downloads that overlay user-built map enhancements. Example – detailed Tour de France stage maps, replete with sprint points, feed stations, climbs, etc.. Maps showing the stadiums of every modern Olympic games, hurricane tracks from 1990-1999. And weird anomalies such as this view of the Studebaker proving grounds with the word "Studebaker" spelled out with trees.
The Tour maps are awesome and if they could be aligned with a real-time text commentary such as those on http://www.cyclingnews.com, I’d be a very happy man.
I need to figure out how to build these detailed route maps and share some of my favorite Cape Cod bike routes.