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."
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.