They definitely are IPv6 ready. If you go into the Airport Utility, open your router's configuration, then select the Advanced icon, you'll see an IPv6 tab. There you can select local-only, host, tunnel, or router.
Today, almost everyone should choose local-only simply because most providers are not IPv6 ready yet. Without your provider supporting IPv6 connections, you won't be gaining anything by putting IPv6 to work. (Your provider will have to support IPv6 address resolution and many other things that make the protocol work.)
Once you enable full IPv6 with the help of your provider, realize you will need to be more robust about firewalls in most cases, because your computer will be directly accessible by every other IPv6 computer out there on the net, since no more address translation will occur at the router.
If you want to play with IPv6 now and you have free time to kill, you can go to Hurricane Electric and get their tunnel service for free. Set up the router as a tunnel, using the IPv6 addresses Hurricane Electric gives you.
Today, even though all IPv4 addresses have been given out by the naming authority, there are still IPv4 addresses to be had from providers, and efforts are underway to reclaim some IPv4 addresses. It will be some time before IPv6 really takes over. There are only a handful of interesting sites that are IPv6 -- there is really very little yet you can't get to over IPv4, and almost all of what you can't get to is simply IPv6 testing and is duplicated on the IPv4 internet.
Apple computers and routers have been IPv6-ready for quite some time, but except for real IPv6 enthusiasts, they haven't been used. Once your provider is ready, your Apple equipment should be fine.
(A note of trivia: Back To My Mac -- the Mobile Me service from Apple -- tunnels exclusively on IPv6, but is so clever that you don't have to change any settings to make it work.)
I have been looking into the possible impact of IPV6 day and within this article which is linked to from the internet society site suggests that Mac OSX is going to struggle with duel stacked websites, any comment?!
My only comment is: this may be true, but my experience and intuition tell me that Apple wouldn't let the problem exist for long once any significant number of users needs to get to dual-stack IPv4 and IPv6 sites.
My only concearn is that if it is true around 8% of wordwide internet users (the proportion of internet uses using MAC OSX, iSO and opera) will be unable to access some major servaces.
http://isoc.org/wp/worldipv6day/ "On 8 June, 2011, Google, Facebook, Yahoo!, Akamai and Limelight Networks will be amongst some of the major organisations that will offer their content over IPv6 for a 24-hour "test flight"."
Understood. But today, even if you have a fully compliant IPv6 setup, there is essentially nothing you miss except IPv6 test sites. I doubt Apple has to do much to fix any problem. They have supported IPv6 for many years. Back to my Mac runs fully on tunneled IPv6 now, for every user, every day.
