The Microsoft site has a menu that I love. Please go to the following site, and move your mouse over the "All Products" link on the nav menu.I like how it lists all products grouped by category. One of my clients has a lot of different products and that would work perfectly for them, so I'd like to know the name of that style so I can Google how to make it, preferably with CSS. Can anyone help? Thanks!
They're known as mega dropdown menus.
http://www.projectseven.com/products/menusystems/megavator/index.htm (commercial product)
Even Jakob Nielsen likes them
Wow, quick answer. Thanks a lot!!