I myself have gone through great lengths to create a similar (minus Webkit) runtime for Mac, Windows, and Linux:
https://github.com/arturadib/node-qt
https://github.com/arturadib/node-five
Despite all my efforts there are edge cases where it simply won't install/build.
Keep up the good work though -- this is a much needed project. (Bear in mind too that Mozilla and other companies are coming out with their own runtimes for web apps, so such projects will likely be rendered obsolete by them).