Check this out from Google:
"Search patterns, trends, and surprises - interactive!
Based on billions of searches conducted by Google users around the world, the 2004 Year-End Zeitgeist offers a unique perspective on the year's major events and trends. We hope you enjoy this aggregate look at what people wanted to know more about this year."
View the 2004 Interactive Zeitgeist
An interactive timeline looking back on the past year (Flash 6 required).