Decent overview of Vonage. My plan is to get one of the Vonage phones for the 212 area code and bring it to Tokyo for use in Japan so friends & family in NYC calling me at that 212 number will reach me in Tokyo.
WaPo – As Promised, a Good Internet Phone (TechNews.com)
This is a good idea. I took a Vonage phone with me to France. It works, but you need to monitor traffic. Sometimes the connection lags.