Knol: a unit of knowledge
Google Knol has been in operation now for over a year, but I have yet to run into a useful knol page.
It suffers from the same problem as Squidoo, there seems to be a law of the internets where the more freedom you give people to express themselves, the lower the quality is of the content created.
A knol on the front page http://knol.google.com/k/art-malov/three-steps-to-amazing-speed-date-speed/1ns0bs8lq5f5c/3# illustrates this point: people are just going to use free web space for spam or crap. Wikipedia works because you are very limited on what you are actually allowed to write there.
