Free Calling From Gmail Within The US And Canada Through 2013

http://gmailblog.blogspot.com/2012/12/free-calling-within-us-and-canada.html

"Many of you call phones from Gmail to easily connect with friends and family. If you're in the US and Canada, you'll continue to be able to make free domestic calls through 2013. Plus, in most countries, you can still call the rest of the world from Gmail at insanely low rates."