To be fair, that's the compiled CoffeeScript. While it certainly is still fairly readable (even writable), the JavaScript you write by hand won't have the same "compiled feel".
Sure, I'll break it down: batman.js is a JavaScript framework for rich JavaScript applications. It's designed to make development as fast and as painless as possible for developers and designers while giving them lots of power.
We designed everything around a number of primary goals such as convention over configuration, HTML-based views, and the principle of least surprise. This is something we're using at Shopify in our future projects, so it's meeting those goals while coming out of real work.
If you want more info, the features page (http://batmanjs.org/features.html) has a list of everything we're trying to do, and the examples page (http://batmanjs.org/examples.html) has a few usage examples. There's still only a couple, but I'm working as quickly as possible to build out the gallery.
And of course, let me know if there's anything else I can answer about the framework. I hope that helped clear it up a bit, though!
Cappuccino and Objective-J will certainly be extremely comfortable for those coming from a Cocoa or GNUStep background. But even for traditional web developers, Objective-J allows you to do some extremely powerful things that just wouldn't be possible otherwise. That said, it is still a strict superset of Javascript, so any valid Javascript is still valid Objective-J, and vice versa.
This was a huge release, we'll be around to help anyone who wants to get started with the new version or Cappuccino in general. Find us on Freenode at #cappuccino or the mailing list, http://groups.google.com/group/objectivej.
Thanks to everyone that helped make this release happen!