Basically, the only maintenance would be user-driven. In the forum that I help run, the problem with sub-fora is that they tend to need periodic housekeeping in order to move threads into them from the general forum that houses the sub-forum (which is where most of those threads are started, because: a) they get more traffic, and b) newer members may not even notice a sub-forum, depending on the layout and specs of the message board).
The advantage that user-driven maintenance has from a moderation standpoint in a forum like this one is pretty clear.
Basically, whomever wants to can post in that sticky thread, and add links to other threads within the forum that are informative or deal with the question or related matters.
Nice thing about that system is also that cross-referencing is possible to posts/threads which were made in OTHER sub-fora and resources outside of the message board itself, even. A sort of "ultimate" thread with a particular informative purpose, if you will.