Go ahead, check out www.brianmuenzenmeyer.com/patternlab/public/index.html, the public Pattern Lab instance used to create the site you are now on.
Go check out the Pattern Lab Node repository on Github for more information, like how to install. Full documentation can be found there and at http://patternlab.io.
My Writing About Pattern Lab
Using Pattern Lab to Design Build and Maintain a Website
In this article I detail the configuration that makes this Jekyll site work alongside Pattern Lab Node, and then be easily deployed to Github Pages.
Solving Problems with Pattern Lab - Small Team Workflow
Additional Pattern Lab Resources
Pattern Lab Side Nav
An alternative style guide navigation developed and open-sourced at Roydan.
Pattern Lab Node As Dependency Reference Repositories
Since Pattern Lab v1.1.0 you may more easily add Pattern Lab as a dependency in your workflow. I created some reference repositories for grunt and gulp toolchains that illustrate this concept. Hope it is useful to you.