This is a TextMate Bundle for SCSS.
It's not very good. If you can make it better, please do!
mkdir -p ~/Library/Application\ Support/TextMate/Bundles
cd ~/Library/Application\ Support/TextMate/Bundles
git clone git://github.com/chriseppstein/SCSS.tmbundle.git "SCSS.tmbundle"
osascript -e 'tell app "TextMate" to reload bundles'
mkdir -p ~/Library/Application\ Support/TextMate/Bundles
cd ~/Library/Application\ Support/TextMate/Bundles
wget http://github.com/chriseppstein/SCSS.tmbundle/tarball/master
tar zxf chriseppstein-SCSS.tmbundle-*.tar.gz
rm chriseppstein-SCSS.tmbundle-*.tar.gz
mv chriseppstein-SCSS.tmbundle* "SCSS.tmbundle"
osascript -e 'tell app "TextMate" to reload bundles'