The drag-n-drop stuff is actually a good deal simpler than it might appear, I considered doing something similar myself but knocked it on the head given that all the extra work and bloat wouldn't really offer a great deal over what is already a system that works fine. In fact apart from to a couple of moderators it wouldn't add anything at all. Not worth it to me.
The forumjump is very nice though

much better than the default if you have a lot of forums.