I was thinking more about a pictorial encyclopedia of things. A good picture of cold cracks, what a split vein should look like, a crank bait with all the parts labeled, etc... No post or comments from anyone just one sticky thread with high quality informative pictures labeled or small description of what is being shown.
Proper grain direction for cutting cranks, tricks of the trade etc....
A lot of the stuff can be found but lets be honest few spend the time to really search threads for any information. It all being one place could be useful if managed/edited properly. Very likely best be done by a small group to truly select good quality information.