Tomorrow, June 8th, 2011, is IPv6 day. many big service and infrastructure providers will switch to IP version 6 for a day in order to test if everything will work fine when the real switch will have to be made. Google developed a special tool to test if you will have problems with the web tomorrow.
I have tested my access from two IP addreses, two computers and three browsers and the result was always successful “You don’t have IPv6, but you shouldn’t have problems on websites that add IPv6 support.”