John Dvorak is ga-ga for Skype. I just tried Skype for the first time over the weekend with my friend, Ken. In addition to Skype, we also tried out SIP Phone both over software and with hardware, and finally hardware based BroadVoice.
Honestly, I was blown away. VOIP is so much better quality than I could have imagined. Skype sounded absolutely fantastic. SIPPhone had some bad interface issues, but was still quite good. And BroadVoice was also pretty amazing. My jaw really dropped with all of them… POTS phones are in big trouble. I will never have a land-line based phone again.