i get what solo's trying to say and I also thought it would be a great idea. What I have in mind though, is that the sub-board will not be used for discussion much. Rather, it'll just have all the informative posts listed there.
i.e. "How to tie hair rigs for carp" ... this question probably gets asked 10 times every year on the board. What we can do is when we have one of these threads that might be useful and informative to everybody, the mods can put them into the sub-board once it dies down a bit, kind of like "my favourites" for your internet browser.
a whole bunch of others threads that would come to mind is like ... "how to winterize your outboard" ... "how to wacky rig senkos" ... etc. ... it's more-or-less like the "FAQ" section we have right now