Some links for further reading on IPv6:
IPv6 Misconceptions: It’s Fake News – Great blog post outlining IPv6 rationale and common misconceptions
www.test-ipv6.com – test your IPv6 connectivity
IPv6-enabling your domain – step-by-step guide by Mythic Beasts
IPv6 Info Centre – by the RIPE NCC, including ‘Act Now’
ISOC IPv6 Measurements – at the ISOC World IPv6 Launch site
Google IPv6 statistics – the percentage of traffic observed as IPv6 by Google
IPv6 Address Planning – guides by RIPE NCC / SURFnet
IPv6 ICT Requirements – useful info for procurements
Facebook IPv6 Statistics – the percentage of traffic observed as IPv6 by Facebook