Hi Carsten,


here is a patch, that sorts the sitemap-file on html-export.


One my configure the sorting per project, by adding these lines to his
`org-publish-project-alist': 

  :sitemap-sort-folders    Set this to one of "first" (default),
                           "last". Any other value will mixe files and
                           folders. 
  :sitemap-alphabetically  Set to `t' to sort filenames alphabetically. 
                           Alphatical sorting is the default. Hence you 
                           must set this to nil explicitly.
  :sitemap-ignore-case     If non-nil, alphabetical sorting is done
                           case-insensitive. Default: nil."


I added a variable `org-publish-file-title-cache' to cache absolute
paths and titles of the files. Otherwise, `org-publish-find-title' would
be called twice for each file.
I have to call it when sorting the files, to sort them by title instead
of file name.



Best wishes

  Sebastian