I was looking at the javascript
http://www.thewildernessdowntown.com/js/main-compressed.js
Looks like they do a lot with latitude and longitude... Also, a lot of functions to position those windows.
Toward the end where it has you type/draw a message it has the 3 windows with some type of machinery and when you type or draw it triggers those windows to play. How is that possible to trigger an event in another window like that?
I guess those guys/gals over at google know their stuff :\ very cool either. The web is going in some really neat interactive ways!