We just rolled out Office 2007. One of the Microsoft features I found that has been a big help in training users is the "Get Started" ribbon that you can download from Microsoft. It installs right in every users application. On it are several helpful Web links. The one I like best is the Interactive Guide. You can start this guide and it shows the [Word, Excel, Ppt] 2003 screen and you click on the feature you want to use (in the location you're familiar with)--the screen then changes to the 2007 Office application and tells you where to find it.

Go here for more information: microsoft office 2007 get started tab. We installed it along with the upgraded Office suite so every user would have it.