Google Envelopes by Industrial designers Rahul Mahtani & Yofred Moik.
"Rahul Mahtani and Yofred Moik have conceptualized the addition of a “Send Envelope” button that would enable users to quickly send a physical letter — rather than an e-mail — with spiffy Google Maps-esque packaging.
Once a person clicks the “Send Envelope” button, Google would print and deliver an e-mail via the United States Postal Service for a small fee. The return address label is in a bubble at their start of a route traced on the map envelope, while the destination is in the address bubble at the end of the route. Between the two is the route that the letter takes to get there."