I'm working on CodeCube (http://codecube.io) - a pastebin that allows you to run the code snippets and see the output live in your browser.

It's built on Docker. I posted an article about how I built it here: http://hmarr.com/2013/oct/16/codecube-runnable-gists/

The source is up on GitHub at https://github.com/hmarr/codecube