There is a great write up on the recent denial of temporary IPv4 allocation to the folks who run Microsoft TechEd in Australia. (Ed. note – check the date
Regardless, it shows now how important it is for folks to really start learning and preparing for the situation where you might only have IPv6 access to the Internet and do you have a transition technology in place to address talking back to your IPv4 only resources. Alternately, are you making your key resources IPv6 enabled which would still allow a client machine that is only IPv6 able to access your content?
Get ready, things are moving quicker than many predicted even with this “timely” article.