However I'm finding it hard to pick which 'Steroids-based' products to choose these days. I'm already pretty buff from https://incident57.com/codekit/
This looks actually really promising. Will try it out in the future!
I love this idea. Hopefully I'll find a good use for it soon. Not sure if you are looking for feedback by posting it here, but I would consider reducing the line-height across the entire site. It might help with readability, imho.
May have to try this out for a client in the future.
Paperplane.io is similar, but without the CMS feature. It's unlimited sites for $9/mo, though, and it autocompiles HAML, SASS, and markdown.
There's also tools like scriptogr.am and skrivr.com that are focused on blogging.