It would be nice to add a binary to the gem that takes in (mustache?) template files, css files and generates a styleguide for those who don't want to include the ruby gem in their production app.
I would be fantastic for the tool to work like sphinx does. Point it at a set of CSS files with some templates, and a pile of HTML pages are generated. Static HTML files would simplify the deployment of the style guide, as you'd only need a web server. Just a suggestion that might prove to be pointless in the future.
It's not a binary per-se, but I wrote kss-node and it has a CLI tool included that might be of interest?
I have not yet looked into KSS to much, but for generating static sites from mustache I love http://laktek.github.com/punch/. It currently reads content from JSON and Markdown files.
Does it look like an option?