Source:
A Few Thoughts On Google Knol (thanks Sox)
The Knol project is going to fail. Google is an amazing tech company, but they don’t understand how to foster communities like Wikipedia. If all they wanted was AdSense inventory, they would have been better off creating a Wikipedia mirror hosted on Google.com and surround the articles with ads. I’m actually surprised that all the search engines haven’t licenced copies of Wikipedia. Why recreate Wikipedia when that content can be hosted on your own site with your own ads for free under the GNU license?
