Internet Phones: Please Wait for the Next Available Opportunity - New York Times

Internet Phones: Please Wait for the Next Available Opportunity - New York Times: This is a fairly good explanation of what Skype is and does and might do down the road. An excerpt--

"Any PC, equipped with Skype's free software and a headset, or with a microphone and speakers, can place a free phone call to a similarly equipped PC anywhere in the world — and without bankrupting Skype. The arrangement places no burden upon Skype's servers: messages go directly from calling PC to receiving PC, peer to peer.
These PC-to-PC calls avoid charges because they do not tie up the lines of proprietary telephone company networks. Voice sounds are digitized, compressed, popped into data packets and sent on their way into the shared space of the Internet. The quality of these digitized Internet calls can be as good as or better than conventional calls.
Skype's revenue comes principally from its SkypeOut service, for calls that originate on a PC and connect to a conventional phone number. The sound quality is not as good as it is with its PC-to-PC calls, but Skype's international calls are cheap — as cheap as those offered by no-name, prepaid calling cards — undercutting the rates of traditional telephone companies. "