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.
Onion Routing
A product of the US Navy Research Lab, the Onion Routing is an Internet based system to prevent eavesdropping and traffic analysis attacks. It is now "off-line" but listed in the ODP for completeness and potential new developments.