One of the most useful tools to help learn the updated interface in Office 2007 is the Interactive Command Reference. It provides a useful mapping between features and commands in Office 2003, and then shows you where those commands are found in the Ribbon.
We have recently released an updated version of these tools for the Office 2010 release of Word, Excel and PowerPoint – with plans for an expanded the number of products to be Project, Access, InfoPath, OneNote, Visio, Publisher, and Outlook
Find the links to them all at http://office2010.microsoft.com/en-us/publisher-help/learn-where-menu-and-toolbar-commands-are-in-office-2010-HA101794130.aspx?origin=HA010370236 and learn where menu and toolbar commands are in Office 2010.
Also… if you would like to have a comprehensive list of all menu and toolbar commands and their new locations, download and open the menu-to-ribbon reference workbook for your product. All of these open as Microsoft Excel workbooks, so you'll need to have a version of Excel on your computer to use them. Get the Office 2010 menu-to-ribbon reference workbooks >