Here are a few notes I made for myself, and that I'm sharing now, at least until I get around to writing a proper entry:
Wikis (well, wiki software) could be a way to implement addventure (a "you are the hero" collaborative story telling game originally written by Allen Firstenberg). Wiki red links are very much like "this episode has not been written yet".
Wikis synthesize (focus), where forums divide (or disperse in their focus).
Universal Edit Button
Semantic web; the semantic triple: [subject, predicate, object]
The wisdom of crowds