There's a forum request for the IDE PhpED to provide syntax support for SCSS and possibly LESS. The response from the PhpED folks has been that they are not able to find a formal description of the grammar similar to the CSS grammar described here: http://www.w3.org/TR/CSS21/grammar.html
Does anyone know where a formal description can be found? There are lot of PhpED users (including me) who would like SCSS support.