There's a good article on CNN.com here that offers a summary of some of the findings of new research from The Pew Research Center's Internet & American Life Project.
You can also take a quiz to learn what type of internet user you are. I found out that I am a "Digital Collaborator."
This is what they say that means:
If you are a Digital Collaborator, you use information technology to work with and share your creations with others. You are enthusiastic about how ICTs help you connect with others and confident in your ability to manage digital devices and information. For you, the digital commons can be a camp, a lab, or a theater group – places to gather with others to develop something new.