Based on prior suggestions regarding the creation of new books similar to Tales of the Loremasters that are set in a defined area, and comments in another topic regarding the difficulty in creating new material due to writers' other commitments (like jobs), how about doing something like this:
Decide on an area to be covered
Decide on the total amount of material required, eg 32 or 64 pages
Decide on what material to include in this and its' length, eg 3 one page adventures, 3 three page adventures, 5 locale details, one local organisation details etc.
Post a list of the various jobs required, including design, proofreading, editing and have people apply for them.
It seems to me the greatest need is to create a regular supply of new material. This may be a way of doing it.