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.
Dailystats
Analyzes the referer log, detects and evaluates gateways, identifies keywords, and breaks down accesses per document and per referring domain. Written in Perl. [Open Source, GPL]