I'm from Europe and when I need to call the US I use skype (you will need an account and a headset) but then you can call most of the world for €0,017 a minute.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.