Free Long Distance Calling from Google Maps

Today Google Maps added a very cool feature to their service. Let's say I am in San Fransisco and want a pizza. I quickly search for "pizza" and in addition to their store's information, you see a little "Call" link displayed just after the phone number. See image below.

If you click on "call", you are prompted to enter your phone number. Google will then call you and the pizza guy to connect you together. Oh, and all of this for no charge.

Check it out next time you are in Google Maps.
US Only.