Toktik, Not sure why you are saying that. Here's part of what Google says in the link that was posted: "When Knol launched, we began with all pages marked with a blanket "nofollow" directive. This means that Google and other search engines would not crawl outbound links from knols, and those links would not flow PageRank to the pages to which they point. The advice Google provides webmasters is to make links "nofollow" if they represent untrusted or low quality user contributed content. We are now at a point where we "trust" a certain fraction of authors and a certain proportion of user contributed links, and so we now use a "follow" directive for links within such knols." So from what I read here it will pass some juice.
Google Knol had a nofollow attribute in robots meta tag. But when I check it now, it seems to have been fixed. It is now showing follow. So, yes. But if you check its robots.txt file, you will see quite a few directories are disallowed for all search engines. So, it is doubtful to pass any link juice.
Heh! Knol are only copying Qassia, the whole concept of which was based on dofollow from the beginning. If you want dofollow links from a knowledgebase, you should go for one that has dofollows as its raison d'etre.