Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
Taking the Byte Out of Cookies: Privacy, Consent, and the Web
Paper on computer ethics presented to an ACM conference in 1998. Suggests minimum conditions to be met to ethically justify the collection of personal data.