Google’s release of Knol is already getting some good coverage. As expected, it’s not long before people start to spam the pages.
Examples:
Excellent Anchor Text Usage:
http://knol.google.com/k/ian-wright/life-insurance/3kqeus4rqskvq/3?locale=en#
Promotions of text links: http://knol.google.com/k/ojal-suthar/top-5-jobs-that-need-life-insurance/bocfh5g6tzdk/2#

White-Hats: Think of a way to produce some authority content. The usual rules apply, it’s a war(!). We try to even the playing fields with information.
Black-Hats: Spam away! The duplicate content issues I believe are still not fixed so you could get a Knol page indexed above your competitors with exactly the same content. Then just switch the links over to your site.

P.S. The page is set to no-follow but that doesn’t stop other benefits including those above.

Spam the search engines from Within with Google Knol is a post from: Insiders View