I really think a section on Industry Knowledge would be very useful. When I first started I had no idea what it meant to hold a line or how a base was assigned. At the top of the section could be a FAQ with brief synopses on what it means to "hold a line", how base assignment works, how upgrades work, and any other useful information. The section could break down airlines, What majors contract what regionals to fly what airplanes and what unions represent who. Current news regarding contract negotiations, pay scales, work rules or base openings and closings. There could be a section for each airline that has all the important information that can only be edited by mods and then a discussion section for threads dealing with the industry. Current pilots can pass on knowledge to beginners in an effort to start the learning process before we get to the airlines.
Another feature I think would be cool is a voting system for each thread based on "usefulness". There are many very informative threads that have been lost. If a person finds a thread helpful, they can check it. If the thread gets over a certain number of useful responses it could be put into a section of "useful" threads inside that sub section, much like the mind numbing topics section in "General Topics".