Joi Ito, at the ICANN meetings in Brazil, has posted some interesting comments and links regarding the exhaustion of the IPv4 Space. [here]
The growth in private IP Spaces has helped stave off this exhaustion, even through the massive growth in the home broadband and mobile markets. I forsee a compromise coming shortly where IPv6 is used between Network Transit Providers, while IPv4 is reserved exclusively for customer-facing usage.
Just another of my hare-brained ideas…