dire outlook on internet and NAT

Interesting reading: some have been asking what the cost of moving from a 
peer-to-peer to a service/consumer model are, in terms of applications 
deployed and the ability to build more robust business models. Many ISPs 
are thinking in terms of VoIP as a next generation business, the one after 
"selling bandwidth". But there are issues with that as well...
        http://www.fourmilab.ch/speakfree/eol/