Introducing government.github.com
This is awesome.  I respect GitHub more and more every day.  However, despite how much I love the GitHub model and think it's a great way to collaborate, it's still (mostly) inaccessible for non-developers.  Shameless plug: I think there is still some room for innovation here, so I'm building a GitHub for everyone else:http://madebyloren.com/github-for-writers