Developer Mark Alldritt posted a pretty nice bit of code (XCode project) for making nice Apple-Like menus in applications. I thought I would try to replicate this same idea with CSS. It worked out fairly well, check out the screenshot:
The CSS just makes use of a couple of nested unordered lists. The nested list uses a li:hover psuedo class, but I image the same could be done with anchor elements set to display:block; to make it a bit more all-browser-friendly. Feel free to download the example and do with it what you will.