Forget AT&T and the like. The only phone company you need is Skype, which routes your calls over the Internet and, as of May 15, 2006, costs nothing for outgoing calls made by users in the U.S. and Canada. And now you can almost forget your cellphone provider too-with this new Voice over Internet Protocol (VoIP) gear, you can make calls using Skype (or Vonage, another VoIP provider) from just about anywhere.