In case you didn't see the NYT "Moment in Time" project, here's a link.
http://lens.blogs.nytimes.com/2010/05/11/readers-16/?hp
The Moment in Time project had people from around the world taking photographs at the same time, 15:00 U.T.C. on Sunday, May 2. It includes stacks of photos by the thousands. You can spin the virtual globe and see the photos, stacked based on where they were taken. Captions under each photo name the photographer and provide info about the scene.
There's a link at the top right corner to take you back to the globe, where you can look into more stacks.
Enjoy
Mesmerized Pturner