ok, after an hour of research here's what i've got...
some sites claim that many of your no-name cards bought in the US will not work when calling the US from oversees.
AT&T has a couple of things that seem to address this. First there's "AT&T Direct Service" which has numbers you can call in many countries so that once you connect to them, you're effectively on the AT&T network, and can then use ?????
I say ???? because it seems a bit vauge. I've seen reverences to using your AT&T Calling Card, your credit card, other calling cards, etc. Personnaly I'd like to use a PrePaid calling card, but there is no specific mentioning of it.
So I'm gonna buy a prepaid, and try using it here, if it says "sorry prepaid's don't work with this service" oh well, i needed a phone card anyway. If it works, it goes in the gift basket 🙂
bart