I just attacked the vinyl article with a freaking hacksaw. From one article that was probably 10+ pages long, I currently have 12 articles, loosely based on pepoluan's suggestions. The top-level article is
http://wiki.hydrogenaudio.org/index.php?title=Vinyl_Guide.
Reference-wise I'm not really sure
any other source would be perfectly legitimate. Even AES articles would not likely achieve the level of objectivity that HA would require. Right now I'm content with including the subjective information that can be backed up by physical phenomena in the basic descriptions of a vinyl systems, and evaluating the objective importance of those phenomena in a separate section.
cliveb and I have been the principal contributors so far (Thanks Clive!). Everybody else is welcome to contribute.
Also, we should get more pictures into these articles, particularly diagrams of turntable components, etc.