I just published the 1.0.0 release of main.css, a standalone version of the H5BP CSS file. The project serves as a repository for development of the file as well as a distribution channel for the component files as separate CSS files. The dist folder contains:

This setup allows people (including HTML5 Boilerplate itself) to consume main.css as a whole, but also allows the component styles to be used individually in different, and hopefully interesting, ways.