The New York Times has a wonderful piece that explains how VoIP is sorta cheap and sorta not.
In reading it, the story got me thinking about all the reasons why David Beckemeyer (aka Mr. Blog) invented PhoneGnome for people who already have a regular phone line and broadband. The value proposition PhoneGnome brings speaks directly to the audience looking to save money, and wants to avoid hassles. You don’t eliminate the PSTN/POTS line you already have, but via the PhoneGnome you get all you want from them via VoIP.