I have been a Lingo (Internet Phone Service) user for over 2 years now. I chose their service originally because they offered a plan with unlimited calls to Western Europe besides the US and Canada.
Well, I just discovered while checking my monthly bill a couple of days ago that my plan (now called Chatter Box) also includes Puerto Rico, the US Virgin Islands and Australia, New Zealand (could be useful if I worked with Rachel of Cre8d Design on improving my blog design), Singapore and South Korea.
Not bad for the average $25 that I spend monthly on the service.
Check the Chatter Box page for more details.
If you decide to sign up, there is a $29.95 one time activation fee and a $9.95 shipping charge for the phone adapter.
The first month is free.
Once the service is up and running you can talk, talk, talk.
For full disclosure we participate in their affiliate program as we do with Netflix and Rhapsody because we like all 3 services.