Gmail has just become even more useful. Google now allows voice calls to another phone using Gmail. Now, that is pretty useful. It will be free if you place calls to the US and Canada until January 2011. Phone calls to other countries will be billed at “very low rates”.

Talking with family and friends in the U.K., France, Germany, China, India, Mexico and other countries is as little as $0.02 per minute. Just dial a number like you normally do and click “Call phone” at the top of your chat list. Only US Gmail users will be able to use it over the next few days. You just have to install the voice and video plug-in.

[google]