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.referata.com
Offers free and paid hosting of semantic wikis, thus enabling wiki databases that allow to add, structure and store data to be used in many different ways. Uses the MediaWiki engine. Semantic by default. Active since 2009.