Cade Metz on Google’s behavioural ads and whether AdSense and DoubleClick data is aggregated.

Frederic Lardinois is feeling “slightly queasy” about Google's user data (behaviour) based advertising technology.

Phil Butler on Google's recent talk about some of its plans for their user data stockpile which involves data mining to increase the precision of ad targeting. He mentions an opt-out option as well as a tool for users to refine the targeting process by turning off some kinds of advertising that is being described by the company as a pro-consumer feature.