I see a few things happening: we've got a separate link for "Ask HN" topics, another one was created for "offer HN" topics, and now we're talking about having

I see a few things happening: we've got a separate link for "Ask HN" topics, another one was created for "offer HN" topics, and now we're talking about having one for RMS topics. Perhaps it's time for a more generic categorizing system of some kind? You could make it so that people can't post in certain categories without meeting a certain karma threshold.