Add an option to use the Showdown GUI for editing or adding content.
It is BSD-licensed javascript that shows the rendered Markdown (or HTML) while editing.

A demo is at <http://www.attacklab.net/showdown-gui.html>

(I read about this on the markdown mailing list.)

> [[Wikiwyg]] also can provide a nice GUI for editing, although it would
> need to be expanded to support markdown. The benefit compared to showdown
> is that it provides a GUI for editing with widets for italics, etc,
> compared to showdown which still leaves input in markdown and seems more
> geared to a fast preview of the html. --[[Joey]]

> Since we have semi-working wikiwgy and it's better, I'm considering this
> todo item as [[done]] or rather, will-not-be-done..