On February 4th, IANA will add AAAA records for the IPv6 addresses of the four root servers. With this transition, it will finally be possible for two internet hosts to communicate without using IPv4 at all. Certain obsolete software may face compatibility problems due to the change, but those issues are addressed in an ICANN report.
http://arstechnica.com/news.ars/post/20 ... rvers.html
