Of GitHub pages.
Edit: Cool, it works! Here's what I did
I really like the idea of having control over your content like this. No complicated SQL database with "posts" and "categories" and "tags", just simple generated HTML.
Here is the test post I used:
--- layout: post title: This is a test --- ## This is a test Of GitHub pages.
Name the file _posts/YYYY-mm-dd-some-title.md
and it will get translated into a page at http://username.github.com/YYYY/mm/dd/some-title.html.
Edit 2: Testing an image