yeah, skype is a godsend for calling overseas (and great domestic calls too). and just to sweeten the deal, there are phones out that look and work just like regular corded / cordless phones, but call through skype so you don't have to be inconveniently tethered in front of the PC.
I bought this for my folks at christmas:
Linksys Dual-Mode Internet Telephony Kit CIT300
My quick review?
So awesome to use that you feel guilty sitting on the couch or walking around the house while the other party you're talking has to wear goofy headphones while sitting in front of their computer.