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”. The goal of the Test Flight Day is to motivate organizations across the industry – Internet service providers, hardware makers, operating system vendors and web companies – to prepare their services for IPv6 to ensure a successful transition as IPv4 addresses run out.
Please join us for this test drive and help accelerate the momentum of IPv6 deployment.
Internet Society - World IPv6 Day

Website Owners
Please send your request by 1700 UTC Friday, June 3. We will not be processing new requests received after that point in time.
If you’d like to bring your company’s website online using IPv6 during the World IPv6 Day you’ll need to make it IPv6 accessible using dual stack technology and provide a AAAA record for the site. IPv4 websites will of course continue to be accessible over IPv4 during the event.
This is a 24 hour event June 8, 2011, from 0000 to 2359 UTC. Websites will be operating over IPv6 for 24 hours on this date. On the day of the event we will provide a status dashboard of websites that have said they will participate. You’llbe able to check a website’s IPv6 accessibility on the status dashboard.
Internet Society - World IPv6 Day How to Participate