This is a new feature in Nikola, my static website and blog generator.
It's aimed at showing pieces of files in the posts, and giving you a link to the full file, does reasonable syntax highlight thanks to pygments, and the syntax for embedding in your posts is not excessively awful, so I can use it for some of my tutorial / book projects.
Here's an example:
.. listing:: md.py python :start-at: def compile_html :end-before: output =
This is not merged into master yet, but should be soon.