An anonymous reader writes "On 8 June 2011 many companies (big and small) enabled IPv6 to their main web sites by published AAAA records; 24 hours later, almost all of them disabled it after the test was done. This year, on June 6th, many of those same companies (Google, Bing, Facebook) will be enabling IPv6 again, but this time there won't be any going back. In addition to content providers, several ISPs are also participating: Comcast, AT&T, XS4ALL, KDDI, and others. CDNs Akamai and Limelight are on board, as well as network equipment manufacturers Cisco and D-Link. Is the chicken-and-egg problem of IPv6 finally, slowly coming to an end?"