I saw on http://www.winehq.org/status/wine That there Nonexistent documentation for "Initial directory structure" and Poor documentation for "Initial INI files".
So I wrote documentation for those on the wiki. http://wiki.winehq.org/Initial_directory_structure http://wiki.winehq.org/Initial_INI_files
Hope I helped out, and this was useful. If so, it could be linked from the /status/wine article, and maybe move to /site/docs/winedev-guide/