I wrote a short blog post [1] on what I found while trying out Github's new zen writing tool. Just using it was enlightening for me if you havn't tried it yet give it a go, or have a look at what I thought of it, then you'll want to give it a go?

  I realised that I wanted to be able to link to this. 
  Not the main github page of my code repository (although I will want to do that too 
  of course) but to this markdown rendered zen mode view of what I want to show them.
  be that code or prose.

Over all I think it's great and have tried to explain my thoughts more fully in the link provided.

[1]: https://github.com/christopherdebeer/zen/blob/master/README....