CBS Evening News reports on how Google has been circumventing privacy settings on the Safari web browser to track users as they surf the web. Stanford University graduate student Jonathan Mayer did the research that revealed what the Internet giant was doing. John M. Simpson, Consumer Watchdog's Privacy Project Director, said tracking user on-line habits is the most valuable information Internet companies and advertisers can get. User preferences and information are what Google is selling. "Don't think of yourself as Google's customer, you are Google's product," he said.