For developers who want a simple blogging engine. Try http://substancehq.com . All your blog's content will be served via varnishd which is an awesome cache.
But I disagree with one thing — the "git push → deploy dance" is a pro for Jekyll! ;)
5 MB of upload later on a clogged wifi link, it was up live. Admittedly, that's because the generation was done on his laptop and pushed up, not done on the server side. But 5mb and a ton of rendering time is going to suck if you're ever changing things for formatting, or edit anything.