css, sass and scss rocks. all those ideas should have their place in css3 or later.
My favorite features:
- auto-insert vendor prefixes, even IE filters (no need for css3 'mixins', which are most of the mixins the avg dev will need)
- can even rasterize linear-gradient backgrounds and serve as image for more pre-css3 browser support. This one I haven't tested but it sounds awesome
Edit: paragraph formatting
My favorite feature actually is that it can grab properties out of parents, as demonstrated here: https://gist.github.com/2563746