I always liked this feature from the Webcrawler web site. It used to be called the Webcrawler Subsconscious, which fits the Neurosphere profile more precisely. (If you look at the “unfiltered” version, it’s even more primal.)

“Ever wonder what the rest of the world is searching for?”

http://msxml.webcrawler.com/info.wbcrwl/searchspy/results.htm?filter=1