Hmm, hard to know what to share and what not to share. I guess it depends on how comfortable you are with vetting people before giving level 2 access. If you think that's working well, then I don't see any real problem with a guide. The acronyms would be there more for convenience rather than to make the threads more obtuse. However, there is value in the FT Trick-It method, or what I call the RTFM method, because it forces people to do their homework. Those who have can understand, and those who pop in hoping for a quick and dirty deal cannot.
I just thought of another possibility, sort of like a reverse wiki. What if there was a space for an acronym list, but the space was kept pretty empty. If someone wanted to know the meaning of an acronym, then they could post there as a query. Members could respond, thereby updating the acronym list dynamically when there is a need.
ex: Bob reads this and doesn't know what RTFM is. He posts "RTFM = ?" in the wiki area. Later on Bill is browsing the threads and sees the question. He updates it to read "RTFM = Read the F-ing Manual."
This might help the people who are strong in travel hacking and weak in MS, or vice versa. Just a thought.