I got a 'flyer' from Verizon last week that advertises 30-cents a minute to a cellphone in Europe if you suscribe to a $4.99 monthly service. Some of the other 'baby bells' probably also offer a package like that.

In Spain, it costs as much to call a telefono movil as to make a station-to-station direct dial call from Spain to the U.S. (using tarjeta telefonica) Several of our relatives in Spain (especially those with vacation homes) have disconnected their home phones in favor of mobile phones and the caller has to bear the added expense.