Replying to @Bethany Nowviskie's post:
Aha, yes, I can see the green check mark on the left - I had missed this earlier, thanks (I take it the check mark I see renders a page as green but does not flag the question/topic itself with a checkmark? As in this thread?). I do follow the reasoning behind no best or closed answers. Conceptually, I fully agree. Just, I think I was coming more from a perspective where the presence of a check mark on the DH Answers homepage on just a handful of articles makes it "look" as if the others haven't been answered yet. This is reinforced a little bit (not much, because the link isn't immediately apparent) by the "Questions With No Answers" link at the bottom left under Find Answers.
Another suggestion might be to remove the checkmark to the left of existing articles to avoid creating the impression that some haven't been answered (and not use this feature anymore in the future) but leave in place a means to mark some responses as "green" for exactly the same reasons you cite above. Alternatively, if you do eventually decide to move to a more complex system (DH Answers becomes a victim of its own untamed, untrammeled, runaway success :^) you might want to look at the new Atlassian Q&A site (https://answers.atlassian.com/) as one possible model. They're using an open-source product from http://www.osqa.net/ It still looks too fidgety for my taste, but perhaps there's a way to turn off various bells & whistles as needed.