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.
www.knowledgeforum.com
allows users to create a knowledge-building community. Each community creates their own database in which they can store notes and connect ideas. It features a web client or alternatively clients for Mac and Win platforms.