The Design Meme Blog have very original Hoverbox Menus, inspired by the Hoverbox Image Gallery developed by Nathan Smith, the effect is simply using CSS and allow you to display big images on hover event. If big is very IN now, this menu is really very BIG. You can see the finalized menu running on Rob Schrab’s new blog</a.
http://design.phpmagazine.net/upload/2006/05/HoverboxMenu-thumb.png