While browsing Idiot on a Stick which I found yesterday, I stumbled across a nice CSS snippet at the IOAS forums. It’s a transparency effect that works on more browsers than just IE (it has the alpha filter):

filter: alpha(opacity=50);
filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);
-moz-opacity: .5;
-khtml-opacity: .5;
opacity: .5;

I tried it on the menu here but noticed it slows down the scrolling noticeably. So, I’m not implementing it here but on the up-coming site about Amadeus :)

I also found a way (which was adapted from this) to make rounded corners in pure CSS, without images. Can’t remember if it was also via IOAS…