Facebook, Google (NASDAQ: GOOG) and Yahoo (NASDAQ: YHOO), websites with more than one billion combined visits each day, are joining major content delivery networks Akamai (NASDAQ: AKAM) and Limelight Networks (NASDAQ: LLNW), and the Internet Society, for the first global-scale trial of the new Internet Protocol, IPv6.
On June 8, 2011, dubbed World IPv6 Day, participants will enable IPv6 on their main services for 24 hours. Cisco, Juniper, Hurricane Electric, and Bing have also announced their participation.
http://isoc.org/wp/worldipv6day/