A lot of this information might already be available, just not in the obvious places. An example:
"how to start an airline" came up a couple of times in this discussion. If you ask an existing airline "How should I begin?", they might see you as a future competitor or as a waste of time - either way, they won't gain anything by helping you.
But plane manufactures do gain something from helping you. Even if only every millionth guy looking for advice actually buys a plane, it's still worth it for them. In face, you can check out Boings guide on how to start an airline:
http://www.boeing.com/commercial/startup/
I'd wager that it's the same in other industries. If you want to start a cable company, talk to the people that'd profit off of it - people selling routers, contractors that build the infrastructure, helpline operators, etc.
Starting a wiki is a great idea, and there's already some information you could copy/link to (depending on the license). You'd have some information right off the start.