On Knol platform there is no official forum. A knol discussion board was started using comments feature but it has not become active. An author bulletin board is active with small number of authors participating in it. Now one more knol author and visitor forum is started using the comments feature and the collection Knol.
Authors and visitors are invited to participate in the forum. Links are knols are welcome and links to outside sites are not welcome. Participate actively and promote your knols and also share information with others.
New Knol Authors and Visitors Forum