Pew Internet Project: America's Online Pursuits (pdf)

"In all, we have asked Americans about more than 50 different types of Internet activities in our tracking surveys, everything from instant messaging to searching for a home online, between March 2000 and August 2003. Over the years we interviewed more than 64,000 American adults about their Internet use. The information contained in this report is intended to function as an overview of the demographic material we have gathered about Internet users through August 2003 and the 25 core activities we have tracked with some frequency through December 2002. Each section provides snapshots of how the prevalence of a particular activity has changed over time, pointers to our previous findings on the topic, and basic demographic trends. A full rundown of our latest findings about each activity can be found on our Web site."