“You have to remember they are also the largest advertising and redirection company on the Internet. To think that Google’s DNS service is for the benefit of the Internet would be naïve,” Mr. Ulevitch wrote. “They know there is value in controlling more of your Internet experience and I would expect them to explore that fully.”
In an interview, Mr. Ulevitch said OpenDNS was steering customers who mistyped addresses to Yahoo search results and ads. “I have no doubt they see that as a competitive threat,” he said. He also stressed that there is valuable information in the DNS layer — like where servers are located, what Web sites people are looking at and how frequently they are looking at them. “I have no doubt they will be monetizing this by increasing intelligence on people’s surfing habits,” he said.
Ulevitch runs the "Open DNS", which has provided this service for some time. He differentiates Google DNS from Open DNS here; you should bear in mind that Google is offering him competition. Finally, I think it is important to remember, as Ulevitch does here, that Google is a profit-making organization.