There's already a few elements of Antonio's ideas in place. The
FAQs and Favorites is the moderators' collective list on noteworthy threads (not specific posts). The Announcements include "quotable quotes", which can be added by any member, though I have added the majority of them (specific instructions are provided when you post in the special Announcements forum). The MVP scores identify, in an abstract fashion, those who are solid contributors, but intentionally avoids the thumbs up/thumbs down/karma approach to avoid rewarding chatty posters or cronyism.
I've toyed with wikis a couple times. At one point I started converting all the articles to wiki format so they could be updated. What stopped the project, besides the work effort, was the general concern among Team HB that it would be challenging to maintain. Wikipedia benefits from an army of volunteer editors and there are those who live to excise the slightest error. An HB-based wiki would not benefit from this level of oversight, though I still find the idea of "thread summary" wikis an interesting idea. DaveC's coffeetime wiki has used this approach effectively.