This may soon not work since AT&T has filed papers to close the loophole  that makes this possible.
I still have a lot of family back in Taiwan and while I don’t necessarily call them, my parents sure do, so this new service, AllFreeCalls.net , is certainly going to come in very very handy.
- Call 712-858-8094 (a phone number in Iowa).
- Listen to the instructions, in Mandarin Chinese, in Spanish, then English.
- At the prompt, enter 011, the country code (Country Codes list ) you are calling and the number you wish to call.
- Talk. Talk a lot.
Thanks Consumerist ! (go there if you want to know why it works)