Ok ok, updated and added the feature which was the hold-up on finishing it, see who is browsing the wiki in SMF Who's Online List. ;)
http://www.web-threads.com/downloads/dokuwiki-smf.php
Link to demo there too, of course you have to register to edit the wiki. On some of the integrations I manage, we have a separate SMF membergroup for wiki editors.
(BTW Andi, I couldn't have made the auth module if you hadn't made it simple to do, thanks for incorporating that.)