CAIDA IPv4 IPv6 Report:: Internet Identifer Consumption

CAIDA Internet Topology
In this interesting report on Internet Identifer Consumption CAIDA (Cooperative Association for Internet Data Analysis), perhaps most famous for their excellent graphs of the Internet topology, present an overview of the issues around the depletion of IPv4 addresses, referencing studies by Geoff Huston and Tony Hain. This is a very succinct and complete description of the problem.