"There's more to Google Maps than a place you double-check your directions. Google's data-stuffed site offers a lot of helpful tools for vacationers, spreadsheet nerds, bikers, and others. Today we're digging into Google's data-rich geo-tool and pulling out some helpful lesser-known features."
This is very interesting (to me). Paste some code on your page and see a button. But, check out the connection to the Google Map. Very cool. (Shared today on Twitter)