Changeset 467 contains template tags for renderingTextile (using PyTextile), Markdown (using python-markdown), and ReStructured Text (using docutils). You can find usage examples and some basic tests in markup.py.
You need to make sure that you have the correct modules installed to do the heavy lifting, but the tags are extremely easy to use:
{{ textile_content|textile }}{{ markdown_content|markdown }}{{ rest_content|restructuredtext }}
Note that all the actual work is done by this one file:
http://code.djangoproject.com/file/django/trunk/django/contrib/markup/templatetags/markup.py
I think it’s a very neat example of how easy it is to write custom filters for the template language.
ajkhkadkjas Google