I recently released a free and open source JS library called Motown. I thought the readers of this forum might be interested in it. Motown will greatly assist you in writing Metro-style applications for Windows 8 in JavaScript. It reduces lots of boilerplate
and glue code and promotes sound architecture by applying proven architectural principals and patterns (such as MVC, sensible defaults for configs etc..). And its fun to use. Here are some pertinent details:
License: LGPL v3
GitHub Repo: http://www.github.com/mtilchen/motown
API Docs: http://mtilchen.github.com/motown
Introduction & Tutorial:
http://labs.vectorform.com/2012/07/motown-easy-javascript-apps-for-metro-part-1/
Direct download link:
http://labs.vectorform.com/wp-content/uploads/2012/07/motown-v0.1.1.zip
The downloadable distro contains a Visual Studio 2012 plugin that you can use to create a new Motown-based project.
If you start a project and get stuck or if you have any other questions/feedback/ideas please feel free to ask me: mtilchen "at" gmail
Thanks for looking.
-MT