I got this in my email this morning:
When you use your Free World Dialup account, today through the end of the year, you can now place calls into the USA and Canada, for free, by dialing *1 and the areacode and number.
We hope you are able to take advantage of this special promotion and take the time to tell others about it as well.
Best Wishes for the Holiday season,
The Free World Dialup Team