Google has today introduced advertising based on user interests and tendencies online. The implications are significant in the advertising sphere --- and by extension the content business --- in linking people with their core activities and interests on the basis of their (Cdn spelling) behaviour.
The New York Times writes on the initiative, noting the criticism on its relationship to online privacy. Google says it will permit users to edit the information gathered on their preferences, presumably to permit a personal firewall.
Testing will begin shortly with a select number of advertisers.