The IETF is becoming more and more concerned about the need to migrate to IPv6 and the difficulty of migrating the Internet to something else than the current IPv4. During the Dublin meeting, there were several interesting presentations about IPv6 :

• Google's IPv6 deployment started as a 20% project like gmail, but it is progressing quickly and we can expect more and more IPv6 content from google : http://www3.ietf.org/proceedings/08jul/slides/plenaryw-4.pdf
• If you believe that NAT is the solution to all problems, consider http://www.ietf.org/proceedings/08jul/slides/plenaryw-2/plenaryw-2.htm
• Apple has been pushing IPv6 recently. Stuart Cheshire's presentation at the IAB plenary shows the importance of the APIs. If you develop networked applications, consider using a more abstract API than the traditionnal C sockets, you'll be more future safe. See http://www.stuartcheshire.org/quicktime/StuartCheshireIETF72.html