@hingehead,
I think this has been discussed in the blog (click at page bottom) or maybe it was elsewhere. Anyway, there is a distinction between simple questions and threads started with expectations of discussion.
The ones that are simple questions that can be quickly answered are, I gather, set for later evaporation, but the catch is, I gather, that the questioner has to mark the question as answered. Which many don't. I think I read this is being worked on.
For some reason, perhaps related to my genetic propensity for using dots at the end of sentences, I've never actually asked a question I wouldn't want discussion on. Thus, I don't know the trick about giving a little red figure (is that a ribbon?) for "best answer to question."