WebKit browsers paved the way with CSS based gradients. Now Firefox 3.6 is out and is supporting them as well, which makes using them for progressive enhancement all the more appealing. More good news, CSS3 gradients fall into the camp where you can specify fallbacks (i.e. images) so that browsers that don’t support them just use the image instead. The one important aspect that makes it worth it: browsers that support them don’t load the image fallback. One less HTTP Request = all the faster your site will load.