Well, here's one little doodad I made:
http://members.rogers.com/aaron-wright/css-menu.html
Feel free to rip it apart :D
It's IE only though. The real ones are DHTML and just change the style properties by linking commands to events, like:
<table border="0">
<tr>
<td onmouseover="this.style.background='#ff0000';" onmouseout="this.style.background='#ffffff';">Mouse over me!</td>
</tr>
</table>