[sellandb]

I would be interested if statistical data gleaned from DNS makes it's way into any other service areas. DNS would seem like a useful way to rank the popularity of web sites, I am sure there are some interesting enhancements that could be made using that data.

[tonfa]

I think their privacy policy disallows it: http://code.google.com/speed/public-dns/privacy.html

> We don't correlate or combine your information from the temporary or permanent logs with any other data that Google might have about your use of other services, such as data from Web Search and data from advertising on the Google content network.

And they say that the logs are only used for debugging, DoS protection and abuse.

[aw3c2]

The quote from the policy says nothing about using or not using the information about what DNS queries are made for data mining or ranking.