I really don't see the benefits of a blog without a backend. Don't get me wrong, I used jekyll a while back and when I used it, everything was awesome.

But then I wanted to do simple stuff like editing a post from another computer that didn't have access to my server because one of my post had a typo.

Then I wanted to list all my blogs by published date and have a different place where I could list post by [type|tag].

Some of those features are available through jekyll, but seriously, what's the difference between parsing a database for post of type X and having jekyll build a list of post on XYZ requirements?

I hope you don't think that database backed blog are slow because on 128mb RAM I had over 20k unique per day on my site. Running Wordpress, without any caching.