"Nodejs, Express, Mongoose, Markdown and Coffeescript" well, sounds simple.
This is exactly what I've been looking for. Sorry it hasn't gotten more attention! I've seen enough versions of the git-powered statically-generated blog. Something with a simple admin interface (so I really can use it from anywhere) and built on the tools I'm using right now, is perfect. Thanks, I will absolutely be adopting this for my own site.