Thats how I write CSS. A good front-end dev can write one set of clean CSS for Chrome, FF, IE8 and IE7 with a small set of styles in an IE6-specific stylesheet.

Combine clean CSS with SCSS (http://sass-lang.com/) for mixin awesomeness and also PIE.css (http://css3pie.com/) for CSS3 on IE. Thats pretty much the winning combo IMO.

Will they hire someone remotely, especially someone with heavy ruby/rails exp?