Some of my pure POD documentation is wildly out of date. Test::Tutorial, Test::FAQ, ExtUtils::MakeMaker::Tutorial and ExtUtils::MakeMaker::FAQ. This sort of pure user level documentation is something that could be very easily done by a lot of people a little at a time. Perfect for a wiki!
And I've tried to wikify the before, but they seem to just get lost. I've used PodWiki in the past, but then I have to manually copy stuff into the repository and I forget. To do that. I toyed with the idea of making PodWiki automatically commit to an SVN repo (which wouldn't be too hard).
What if I had a way to convert from Google Code wiki markup to POD? Then I could let people work on the documentation in the wiki and just convert that into POD for distribution! Soooo... who wants to write the converter?
(Alas, Google Code does not allow non-project members to edit a project's wiki, something I would like to see fixed).