For folks wondering about what the "CoffeeScript is about to get even more interesting" bit is about, it's just the past month of changes since 0.9.4, which are considerable indeed:
If this article inspires you to get started, and you don't mind doing a little bit of legwork to figure out syntactic changes, I'd recommend starting with master instead of 0.9.4.
https://github.com/jashkenas/coffee-script/compare/0.9.4...m...
If this article inspires you to get started, and you don't mind doing a little bit of legwork to figure out syntactic changes, I'd recommend starting with master instead of 0.9.4.