You might also consider picking up a MagicJack for $39 w/1 year service. I know people either love it or hate it but so far I've had good luck using it for calls back to the US from: Japan, Australia, France & Ireland. Most folks use an external telephone, but I prefer to use the dongle-less softphone implementation using the netbook's speaker & mike for portability.

The good: 1) You get your own phone # in pretty much any US area code. When someone wants to call you they just dial the US #. More than likely you won't have the computer on when they call so it takes a message as well as e-mailing you a .wav file. 2) You can direct outward dial to cell phones, 800 numbers, etc. I dislike leaving my computer on at home 24/7 just to receive an inbound Skype.

The bad: 1) They could go out of business tomorrow and you're sol. 2) It's pretty crappy if you don't have about 60 Kb/s or so of bandwidth.

Anyway just another tool in the arsenal.