For the tin foil crowd this also means that google knows exactly what sites you are using and when you use them. As someone who has dealt with BIND since the early days as well as tinydns and djbdns this will overall be a good thing.

It’s also going to steal ad revenue from the sleazy ISPs that substitute an ad-laden “not found” page for mis-typed browser URLs. Google will do the right thing when a resolution query fails.