See the article for some scary statistics.
More than a decade after the Internet went mainstream, the world's richest information source hasn't necessarily made its users any more informed. A new study from the Pew Research Center for the People & the Press shows that Americans, on average, are less able to correctly answer questions about current events than they were in 1989. Citizens who call the Internet their primary news source know slightly less than fans of TV and radio news. Hmmm... maybe a little less Perez Hilton and a little more Jim Lehrer.
If you have a wsj.com account, also check out a "Web 2.0" debate between Andrew Keen ("The Cult of the Amateur") and David Weinberger ("Everything is Miscellaneous").