Check out my new project at Github. I wrote a little Freemind to Mediawiki converter using CoffeeScript.
CoffeeScript does really a good job for writing such software. Parsers, writers, and other data processing stuff can be easily done, thanks to CoffeeScript comprehensions and other smart language features.
Together with running all code running smoothly via node.js... Really nice!
-- written on an iPad, typing long text, and copying links is horrible ;)