I discovered Skype when I became friends with a woman who was adopting her daughter in Vietnam. She told me that people she knew who had gone to Vietnam and other countries to get their children often had families and friends download this program so that they could actually talk for free over the computer.
This sounded pretty cool to me! I downloaded the program and I got some headphones to go with it. If you have a webcame - I do not at this time - you can also talk face to face, so to speak.
I was able to talk to my friend while she was in Vietnam absolutely free. I have since gotten friends around the country and in other countries to check out Skype so that I can talk to them, too.
You don't have to use the program as a telephone. You can also use it as an instant messenger. AND you can call other phones, not just Skype numbers. When my daughter is older I think we will get a video camera to go with this program so that she can talk with my parents while they can see her and she can see them.
And it's free! So why not?