We are putting up a listing according to the DMOZ structure and have just started. All of the links under the categories will be Google Knol pages, since this is what this directory is all about. We are trying to make it easier to find articles on Knol.Google. There have been over 350,000 articles written from August of 2008 until October of 2010. Google is just letting the site run on its own without a Help Desk anymore, so groups of knol authors are banding together to help the site prosper.
Suggest a category and if it is not listed in DMOZ and the administration agrees, it will be added.
Randy Kleinert