Hello there. As we all always see, Ezine articles, articlebase, goarticle, squidoo, hubpages, blogger were always used in article marketing. But, I never see anyone use Google Knol. Why? I have a plan to try it out, but I don't want to outsmart you guys, maybe there's experienced member have tried it and fail, so I don't waste my times... Anyway, that's the use of community wasn't it? Asking other people's experience. Thank you.