Google has extended their free domestic calls within the US and Canada through 2012.
Here is a post from Google’s Group Product Manger Vincent Paquet:
As the holiday season approaches, we’re happy to announce that we’ve extended free domestic calls within the US and Canada for 2012.
This is our way of helping you connect with friends and family across the country. And you can still call the rest of the world from Gmail at our insanely low rates.
For those that don’t know what Google Voice is, Google Voice is a telecommunications service by Google launched on March 11, 2009. The service is configured and maintained by the user in a web-based application, styled after Google’s e-mail service, Gmail, or through the service’s Android and iOS apps.
Google Voice currently provides free PC-to-Phone calling and PC-to-PC voice and video calling worldwide between users of the Google Voice and Video Chat browser plugin (available for Windows, Intel-based Mac OS X, and Linux). Many other Google Voice services-such as voicemail, free text messaging, call history, conference calling, call screening, blocking of unwanted calls, and voice transcription to text of voicemail messages.
If you have never used Google Voice, you can learn more about it by clicking here.