Google has been offering free calls within the US and Canada for quite some time now. But they’re obviously not satisfied with the number of users yet, so they decided to prolong the offer for another year. That’s right, you’ll be able to make free domestic calls through 2013!
The way I see it, this is the best marketing strategy a company could have. Instead of investing cash in ads, offer something for free to your customers (who in turn will spread the word about the company and its product/service).
And if you don’t live in North America, you can still benefit from cheaper calls to landlines and mobile phones from GTalk. Neat.