I have vonage. For a one man shop, I found it to be a pretty good deal, especially since I can check voicemails from any internet connectiona and forward the voice calls to my cellphone.

Tha said, I would not get it if I had to do it over again. Here's why.

1. You need a very good internet connection, high badwidth and all that
2. Low band width equals you sounding like you are talking thru a tin can.
3. Low bandwidth means incomlete or nonuseable fax lines.
4. Number portability. Go ahead, leave vonage, they keep the number.

I am moving my office to new location in coming months, I will keep the vonage line until the FCC requires them to release my number, but you can be sure that the local phone company will be getting my business.