Documentation pages
Fragment of a discussion from Documentation talk:WordPress Documentation Style Guide
Here are some helpful reading on what WordPress codex does.
Contributing Guidelines Styles
I like the idea of having a a list of articles that still need to be improved. Though I would like the Tasks list, it might be useful if we have more then a handful of contributors.
Also look at the Editing help page which could help with our own Help:Editing, just some thoughts.
Enej