Hallo,
I think, one of the useful things on the old pd.org has been the FAQ. Hans now has created a "Topic" inside the FAQ folder to collect FAQs interactive. While the interactivity is very important, I think, that a Topic might not be the best way to organize it. For example, it is very hard to group items in a Topic or to search for unanswered questions.
I looked at how plone.org organizes their faq hoping to find a kind of "FAQ wizard", but they just use a Wikiweb for the FAQ.
This might not be the last word, but I do think that it is at least a bitbetter than a Topic:
We could collect new questions via comments and then create a list of unanswered questions by using the back links feature of a Wiki. (using for example "AnswerNeeded" as a called WikiBadge.
I made an example for this here: http://www.pure-data.org/Members/fbar/sandbox/AnswerNeeded
What do you think?
ciao