I found the following story on NPR:
http://www.npr.org/templates/story/story.php?storyId=129298003&sc=17&f=1001

Tracking The Companies That Track You Online

- August 19, 2010

No surprises here, but what I found interesting is that some ad groups will allow you to see the info they've collected. 



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Published

25 August 2010

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