I agree, collecting some of the stuff that's accumulated here and there and incorporating it into the book would be a good idea. Most of the stuff around here is of high quality , too, I suspect that the average member here has a bit more experience and skill than the typical gamer. That way we could have all work from the same page when dealing with species and ships that lack official write ups. t also lets you go over the things that have several different interpretations and pick the best.
I would think that most people here would be happy to see something that they posted make it into the book, providing that they are asked, and get credit for their work.