As you certainly already know if you follow regularly this web site, the Internet addresses will soon be depleted (all used). The end of the Internet world as we know it should be reached around 2011 or 2012. That is the reason why some companies are working to push out the most common Internet protocol (IPv4) and to make space for its successor (IPv6).
This is why, while the Internet Engineering Task Force (IETF) was preparing a night without IPv4 to reach the largest possible public, Google launched a version of its search engine reserved to IPv6: ipv6.google.com (If you are like almost everybody, you will not see anything at the end of the link).
Now, we all have to switch as soon as possible.