If you are using sass, you might as well use http://compass-style.org/ Awesome p...

cmykgrayscale on Dec 1, 2010 | parent | context | favorite | on: Sass Ruby's Clever CSS

If you are using sass, you might as well use http://compass-style.org/ Awesome piece of software that brings together sass/scss and css frameworks (blueprint, 960). It also has a built-in list of commonly used mixins.