I can also use a web interface if I am desperate, as well as adding an entry as a file (the email interface is similar to the file mechanism---it just pulls the entry out of the body of the email).
Granted, the language I used is rather unorthodox, but it works.
Reading the source and discovering:
WTF? This isn't a WTF. This is a debugging technique.
Hard core! :-)EDIT (Thu Jul 23 21:33:12 PDT 2015): The formatting on that post seems to be borked a bit, I'm working on it.
That said, I had no real issues setting it up on OS X and Debian/Ubuntu, but then I was at least somewhat familiar with how all the parts are supposed to work.
i just write stuff and git push it to heroku
It's a neat concept, for sure, and incredibly similar to something I once wanted to implement for photo galleries (and might still, since this actually seems to work quite well).
I find that it's often developers who don't, making it a questionable tradeoff (in my mind) for a blog written by one. For this very reason I choose to use absolutely no JavaScript on mine. (Correction: Oops, Gists are included via JavaScript — I'll be replacing them with code blocks ASAP.)
I had some of the same annoyances as the OP, and chose Jekyll + GitHub Pages instead (http://nkantar.com/choosing-jekyll/). I found that optimizing for my workflow (write Markdown, commit, push) was more worthwhile than having absolutely zero generation tools (which I don't even need if I simply create a new file on GitHub, as a neat bonus I've used at least once so far).