Andrew Keen wrote a book called The Cult of the Amateur: How today’s Internet is killing our culture. David Weinberger wrote a book called Everything Is Miscellaneous: The Power of the New Digital Disorder. Both of these books are more or less about the Web, only Keen thinks it’s terrible and Weinberger thinks it’s wonderful.
The Wall Street Journal set them to debating, and the full result is here: Full Text: Keen vs. Weinberger. It is a long but fascinating read.