Well, today is the day. There has been some odd scaremongering though - with some reports saying that internet access will be turned off [for Ipv4] which is, of course, not true. There have even been scaremongering sales calls by people suggesting there will be some huge IPv6 DDoS. But so far no problems.
Basically, what today is about, is some of the major players all trying out IPv6 at the same time. This not only gets it out of the way in one go which is less disruptive if they do have problems, but also resolves the issue of who jumps first. People like google and facebook making their services work on IPv6 (as well as IPv4) for the day. There are a lot of people doing this from major players to small companies - I spoke to a friend of mine who was just setting up IPv6 access on his web site last night.
But today has been taken on as a focus for attention all about IPv6 and a way to get the message across that things are changing.
At A&A it is pretty much business as usual. Our traffic to google is already IPv6 and IPv4 and has been for a long time, so for one of the major players there is no change at all for us. Having offered IPv6 for 9 years now this really is run of the mill stuff. We already have traffic on LINX reaching 10% IPv6 anyway and today may just be slightly higher if that. Our customers already either have working IPv6 or have IPv4 only and not a broken installation else they would not get to our web site or mail servers, etc, so we do not expect any broken installations failing just because facebook is IPv6 now.
We are shipping an IPv6 configured broadband router and customers have them in their hands today - not sure if any will be on-line today or not.
And if you have a web site with us then you have been IPv6 for many years already - welcome to World IPv6 Day participation.
But, the day is not over yet, and people all over the world are watching and monitoring carefully to make sure things cope as they should.