There has been a huge growth of activity since I first started visiting DC. While the current interface for the forum is very good, as the rate of activity increases, I find that it is becoming harder to keep up with all the activity. Many times I find myself rereading an old thread 500 comments long trying to figure out where I last left off reading. If there is an improvement DC needs, it is in making the forums easier to navigate and stay on top of ongoing threads. It would be nice if DC had a feature to drop me off at the last post that I read on the particular thread that I read before (similar to the Google reader suggestion mentioned above). I know that a feature like that is difficult to implement but it is the one thing I can think of that really would improve the site.
I think its important to point out that changes to a site like this could be counter productive. For every added feature, there is also added bloat, which could confuse newcomers and annoy frequent visitors who never wanted the feature to begin with. I agree with most on this forum that making small changes could do wonders for this site. I am not sure about big things. If it was up to me, I would start by trying to give the site an even cleaner look, removing features if necessary, before trying to add or change other things.
DC is truly a gem on the web. I would hate to see it ruined because it gets cut the wrong way.
PS: We need a Cody smiley.