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.gmane.org
Archives mainly mailing-lists related to open source software and allows read and post access to these lists via a newsreader. A web gateway as well as a weblog-like interface are also available. Free service.