KnowledgeKit
[Bill] Well, since I am the author of KnowledgeKit, and this is linked (accidental nature, notwithstanding), I might as well put something here.
KnowledgeKit and PTK
I am currently (among other things...) working on a new version of the KnowledgeKit. I do have a PTK aware version. By aware, I mean it recognizes logged-in users, allows them to add FAQ Items, and doesn't require them to enter their name and email address.
The next evolution of KnowledgeKit will be called KnowledgePortal, and will be a full PTK product in the manner that DemoPortal is. I am unsure as to whether or not a portal can have a portal within it. I will make a version that will be an expansion of the KnowledgeKit that will integrate with a portal if this fails.
KnowledgeKit
For those who haven't seen it, it can be found at http://www.zope.org/Members/Bill/Products