Questions to resolove, see #55:
- How to load said scripts and CSS into the page so that they can be used on the front end, i've started a little something here #1423500: Use RequireJS to load all JS,
- And the most important one for last: How are we going to use theses script?
However, there is lovely, lovely http://labjs.com/ which allows for parallel loading and execution of js, just seen a contrib project for this http://drupal.org/project/labjs. - LABjs is being used on twitter and examiner.com amongst others.
It's MIT licensed so we'd have to speak to the author about dual licensing. I haven't reviewed the contrib project yet to see how well it works, however it's the sort of thing which could likely benefit from being built into core drupal_add_js()/#attached