A company called Futurephone is offering free international calls from the United States to 55 countries. According to the company, there's no catch — no advertising, no calling from a PC, just free and unlimited overseas calling from any telephone.
Here's how it works: dial 1-712-858-8883, a phone number in Iowa. After selecting the language for voice prompts, you're instructed to dial 011 followed by the country code and the number that you want to reach. In a moment, you'll be connected to that number. Futurephone says the service will be free until the year 2010.
I tried Futurephone briefly and it worked as promised, but I'm interested in others' opinions about the service. If you've got someone to call in another country, give Futurephone a try then post your results here.