Some people dislike the fact that Office 2007 comes with a big fat ribbon bar on the top row taking up quite a lot of real estate in their precious viewing area. If you’re one of them, this office addin can get you what you want by replacing the ribbon bar with those classic menus seen in office 2003. The pic below shows an example where there’s no more ribbon bar in Microsoft Office Word 2007.

Update
The office addin link above (to geocities) is now dead. A better option is to try this