There are some people who already use DokuWiki as a Content Management System CMS for their websites. See discussion in
http://wiki.splitbrain.org/wiki:discussion:wiki_cms and
http://wiki.splitbrain.org/wiki:experiences:websitecms
and some examples at
http://wiki.splitbrain.org/wiki:experiences?s=website#normal_website
So I suggest to close the task here.