If I read the doc correctly adding a file called
Code
 mime.local.conf
in the wiki conf directory and putting

Code
# this would be downloaded
epub         !application/epub+zip
in that file will let you open the file in Stanza directly on a mobile device like my iPod Touch. I can currently get to the epubs but what I get is the raw file shown in a Stanza browser window.

Not having a doku wiki to experiment on I can't be sure that works.

Doku wiki Mime doc
Stanza developer doc Near the bottom under Links in Book Descriptions.

The Moon Society