What sort of menus can I make with CSS?

There are practically no limits to what you can do with CSS , the trick is figuring out how to make it do what you want! Or another way of looking at it is: what sort of ideas can you come up with to use CSS in a new (and hopefully useful) way? 
 Here are just a few common things you’ll see sites do with CSS : 
 
 Drop-down menus that show up when you hover your mouse over them 	 Pull-up menus, that go up instead of down 	 Horizontal menus 	 Nested hierarchical menus 	 Menus with images in them 	 Stylized borders 
 
 Tons of great examples can be found here: http://www.cssplay.co.uk/menus/index.html