Some papers have been written on the subject of Private DNS updates and reverse lookups for RFC 1918 space. Here are a few links:

The Windows of Private DNS Updates

CAIDA paper

Identifying and Reducing Private DNS Updates

CAIDA/WIDE Presentation

Is Your Caching Resolver Polluting the Internet?

SIGCOMM'04 Workshops

The AS112 Project

The 2008 Ottawa DNS OARC Workshop with presentations on AS112.

How to Disable Dynamic DNS Updates on Windows Systems

HowTo courtesy of CAIDA

Setting up an AS112 server using NSD

Configuration file courtesy of Stéphane Bortzmeyer

Pour nos amis il y a un bon description sur le sujet en Francais

Le système AS112, par Stéphane Bortzmeyer

Additionally, work has been done examining the effects of wide-scale IPv6 deployment by Geoff Huston and George Michelson as outlined in their presentation to the IETF DNSOP working group.