[cheerleader]

Nice post. Despite what others said, there's a place for a quick overview of Jekyll. The Jekyll wiki (which, have they updated it recently? It seems more useful than I remember it), while comprehensive, covers far more information than you need to get up and running. A quickstart guide would have been handy when I was starting.

A couple things that might have been helpful would be to mention how to create new posts (since they have a specific format) and perhaps linking to a barebones deployment of Jekyll that followed along with your post (though you did link to your site, so kudos for that).

Keep on writing. A Jekyll plugin tutorial (as mentioned by ElongatedTowel) would indeed be a useful resource.