Ah yes, I was looking at some of Wikibooks - it doesn't seem too developed yet; hopefully that will change.

Hmm, I agree with your issue with the lack authority, and honestly, I don't really know what to say. Having something like this peer-reviewed by professionals (determining who is is a different matter, I guess) is perhaps too idealistic. At best, I can imagine students dedicating some of their time to such an endeavor - I don't know if many researchers, for example, who usually know their field quite well, would be willing to volunteer their skills.