Hello, and welcome to the forum!
The Personal Message system can be reached by clicking the little green scroll underneath any forum-user's name. It's on the same row as the strange baby-face-square-thing.
Secondly, I would agree with each game, at least, having a Q&A thread. Now granted, I play FC and so that subforum already has a Q&A thread stickied, but games like Mistborn do not; including one would be quite useful to people who played them.