When we built our home in Lake Tapps (Seattle, WA area) we started with Vonage. That was almost 12 years ago. We are still loyal Vonage customers.
We travel with a router & phone and use it all over the world. We have the same numbers we started with (great for the business).
Calling people here – is easy! You can even share the line with friends (we have done that with our second router, given it to a neighbor).
Just need good internet and that is about it. They have a package with 100 Latin American minutes you can add to your package. (did you know that you can have friends and family call you for free – there are toll free numbers you can use with Vonage to dial first and then your number).
Find a local access number for friends and family
http://www.vonage.com/vonage_access_number.html