AtScript: The ultimate superset

I have read and heard from many sources that AtScript is just one of the hot stuffs knocking on the door and something worth-learning. But the sad thing is that there are barely any resources on the web to learn atScript. Just in case, you guys know of any website or other learning materials for atScript, then please let me know.

AtScript has been replaced with TypeScript; see the blog post.
This document is historical.