So, I was reading The Night the IETF Shut Off IPv4 last night and came across something weird; I could access all of the IPv6 sites mentioned in the comments…waaahhhtt?? :-/
- Went to http://www.ipv6.org/, it says “You are using IPv6 from 2002:42b0:596d:0:219:e3ff:fe06:9d3f”
- Went to http://www.sixxs.net/tools/ipv6calc/ and it also said I was using IPv6 also but my address type was “unicast,6to4,global-unicast,productive”.
Ah, so 6to4 is the imporant part and so is the 2002:xxxx, that means I have been setup with a 6to4 tunnel and didn’t even know it 
UPDATE: WOW! am I behind on the times, this has been know for a while - in fact I even remember reading the story (admititly I didn’t have an AirPort at that time, so I paid little attention) back in Feb 2007
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