I've been hacking around a bit to extend my silverstripe site with a wiki. It's been quite succesfull, as I now have integrated user login and the dokuwiki pages with nice silverstripe menus above it. I figured that there might be more people interested, so attached is a silverstripe plugin, an auth backend file for dokuwiki and some changed template files. To get it running you need to enable rewrite-urls in dokuwiki and create your silverstripe wiki page with the same url as where dokuwiki is located. Now you just skip the rewrite rules for dokuwiki that point to doku.php, as they'll be catched by silverstripe, while images and feeds are handled by dokuwiki directly.