http://nubyonrails.com/articles/dynamic-css

This is something I wish existed for some time now. I’m thrilled that it does!

I’m a big fan of HAML and SASS (mentioned in the article). I really like the way that they cut down repetition in the HTML and CSS, and reduce the number of syntax errors that I can make. They’re probably not for everyone, but they’re definitely worth a try. The only downside that I’ve seen is that when you get the HAML/SASS syntax itself wrong, the errors can be somewhat cryptic.