I like to do documentation both directly in a program (like with POD) and in an associated wiki (like here). I do not, however, want to duplicate effort.

This oddmuse module allows me to expose a raw file for display and editing through the wiki interface. Changes to the file will be recorded through Darcs, and after review pulled into the main tree.

Additionally it will have a documentation-only view, displaying only the HTML version of the documentation without the code, just like you were viewing it in perldoc.

A cron job will periodically pull in changes from the main source tree, so that when I update the documentation there it will be reflected on the wiki as well.