If you really feel the discussion forums warrant removal, then that's fine, but personally I think there is still the potential of them being utilized. It's just a matter of determining where the problem lies exactly with the current layout.
I don't have the answer, but I have made some observations. The cornsnake forums are working well with the similar layout, but the difference is they are one catagory and all the forums more or less pertain directly to that one subject. The result is a fairly short list of forums that are all easily seen and found by anyone browsing the list.
Compare that to the main reptiles and amphibians page here. The forums here are aimed at many catagories, which is good, but using the same layout as the cornsnake forums here results in a much longer page requiring a user to scroll way down to discover the discussion forums.
As far as I go, if it's posted on this site I see it, because I use the "view new posts" feature. I think it's safe to assume however that only a relatively small percentage of Fauna users know of this feature.
I am more of a responder than a thread starter, but when I am starting a thread I still have to hunt for a minute to figure out where I should be.
I think the lack of use in the forums is at least in part due to the inability of many of the users to access them.
I think the vbulletin forums are one of the best applications for this purpose, but when used on such a large scale it becomes problematic to the ease of use.
Look at a forum that does receive alot of traffic, such as the forums at k.com. They also have a substantial list of forums, but the list has a concise layout and it's relatively easy to locate whatever forum one needs. The web has created an environment based on impatience and the desire for immediate results. The majority of people just won't devote much time to exploring a site that requires much effort on their part.
I could be completely wrong about it, but I do believe the forums here would be used more. I just think that many don't know they're there, or can't understand how to locate them.
I know you made the forum map, but how many people do you think actually utilize it.
I wonder if an HTML page listing the forums in a more concise manner with the links leading to the existing forums would make any difference? I'm just shooting in the dark there, I don't know what the best course is to take. It's just my opinion though that I'd like to see the forums stay around, if something can be figured out to gain the usage.