I am trying to use wp-minify to minify my js/css on the fly. I can get the 'direct' css files to be minified, but I can't seem to get wp-minify to minify the 'linked' css files. My theme is a child theme off of twenty-ten, so my child theme's styles.css gets minified, but not twenty-ten's styles file.
@import prevents "parallel" downloads. I'd not suggest to use it in case you want to minify css files.