8th June 2011 was world ipv6 day. If you refer the link "http://www.worldipv6day.org/", it says many of the companies (including linux kernel site) did switch to ipv6 stack to have global scale trial. If you refer the resource section, some countries have their own ipv6 day. Hope India will also have one in future. The event passed on without making any news at-least to me!! Here is the logo
May be every year this event happens however this is first time I am noticing though; roughly a month after event passed off!!