The Cult of the Amateur

I just read the book review of The Cult of the Amateur : How Today’s Internet is Killing our Culture, by Andrew Keen. Keen seems to make some good points pertaining to the reliability of Web 2.0 sites, but I believe the positive aspects of these participatory sites out weight the negative. Also, I don't see a problem with traditional resource sites which rely on experts, co-existing with the so-called “noble amateur” sites.