Some key points:

According to a Pew 2005 survey, on a typical day, 50 million Americans turn to the Internet for news.
Pew also revealed that the early adopters, the ‘high-powered users,’ who Pew defines as users who performed more than four different tasks online in a given day, are particularly voracious consumers of online news: 71% [...]

The American Society of Newspaper Editors and Newspaper Association of America have put together a report, Media Usage: A Generational Perspective (PDF). The findings in the report are based mostly on secondary research but they tie the research in together nicely.
Here are some key takeaways:

The Internet is the most important news source for those [...]

I’ve been doing a bit of digging on the impact of the Internet with regard to politics. Here is some food for thought from the Pew Internet and American Life Project (2006) report on e-government and e-policy.

On a typical day in August 2006, 26 million Americans were using the Internet for new or information [...]