Many of us have had the expierence of being overseas and wanting to call home, or having our spouses overseas and wanting to have them call home. Or how about being stationed as a family overseas and wanting to keep in touch with family and friends that are still in the states?
Google has helped us all by providing Google talk free for anyone with a .mil e-mail address. All you have to do is sign up for a google account, if you have a gmail account already you can use that one and then download the plugin so you can make calls just by using your gmail account.
Get started using google talk for free here