Using Gmail to call on the telephone

Google's Gmail just implemented free telephone calling in the U.S. and $.02 a minute to the rest of the world. Using your computer's built-in microphone or an external one plugged into the computer, you can now make calls to any land line or cell phone. Google's free service competes with Skype and other online phone services, but has the edge in ease of use and availability. Some people have already used this kind of service for work and even home.