Stylus, the Revolutionary Successor to CSS (nylira.com)

I kinda doesn't like the concept of such cryptic representations of standard language. May be by writing such way you saved a lot of characters, but anytime standard CSS is lot more readable thus maintainable.

Though I also feel, browser specific styles are really painful. And I also miss lack of functions, variable in CSS.

less characters != equal readability. I'll stick with SASS for now.

I think this article is not a great introduction to Stylus, it's a better idea to check out their Github page: http://learnboost.github.com/stylus/

While you can write functions to create abbreviated versions of CSS properties, it's entirely optional.

Also I actually prefer Stylus' mixins and functions to SASS'.