View the effect
Drop down menus are a really convient way to fit a large menu into a really small initial space. For a long time people have just used a form element for standard drop downs, but with minimal effort you can create a much slicker effect using jQuery and CSS.
This is a very popular look, and I’m not sure if it has an official name, so I’m going to just call it a ‘drop shadow overhang’ just because I don’t know what else to call it. Its basically a bar of color across the top of the page, with a box of white jetting up over the edge. Its got a web 2.0 look, so its been getting a lot of use.