For those who may not know (I didn't), Sass is a meta-language for CSS, which adds variables and some syntactic sugar. It stands for "Syntactically Awesome StyleSheets."

http://sass-lang.com/

http://en.wikipedia.org/wiki/Sass_%28stylesheet_language%29

Very, very useful. I got used to having 10+ sass partials and it's becoming an inconvenience to track specific declarations in firebug. (Here's an interestin post about how to structure a sass project http://wiseheartdesign.com/articles/2010/01/22/structuring-a...)

It'd be fantastic if there was a way to integrate firebug with the actual .sass/.css files, so I can make my adjustments, see them instantly, and press save if I like them.

It would stop me having to context-switch between my browser with firebug, and TextMate.

I can't imagine it being terribly difficult to do this, but what do I know?

You should look into xrefresh. It's a really great way to edit in sass and then see the changes in your browser right away.