perhaps of interest:
<a href="http://www.useit.com/alertbox/20001112.html" rel="nofollow">http://www.useit.com/alertbox/20001112.html</a>
<a href="http://www.useit.com/alertbox/mega-dropdown-menus.html" rel="nofollow">http://www.useit.com/alertbox/mega-dropdown-menus.html</a>