If you have never used the Google zeitgeist, you should really start. It is a lot of fun. They have two interfaces for it. One is an archive list and the other is a bit more elegant. I actually prefer the list version.
This addiction to see what people are searching is assisted by the guys over at doorOne Projects who put together a device called the Voyeur. The Voyeur pulls queries from MetaCrawler and displays them on the Voyeur in your family room! Very cool if you ask me, and very addictive. All of you out there who want to play voyeur from your computer at work can use the feed it pulls in. Enjoy!