one other thing i have neglected to mention but really should...
i'm not an employee of skype, but rather a VERY hardcore user
i use it exclusively to make phone calls and that is how i can afford to call my gf everyday...probably just 1.20 USD an hour (but getting more expensive as Euro-USD rates change)
you can make a skype-skype call (to another skype user) for free and the founder of the company has said this will always be so
you can make skype-landline/cellphone, called "skype out", phone calls for very little price, depending on where the landline/cellphone-user is located
here's a link, it's very handy program click and it's also available for Mac,Windows AND Linux not to mention PocketPC as well
and right now they have a donation site up for UniCef, etc, for the victims of the tsunami(s)