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.adaptivepath.com
Lane Becker writes, "Rather than a validation done once before completing a product... internal, qualitative usability testing [should be] done earlier, more frequently, and as part of the design process - not separate from it."