The following free interactive courses are available from Microsoft:  
 (click on the course required)
Download a connection to add links straight into the program, It's called the Get Started tab.  (click for link)
Microsoft Vista
Features Explained
Microsoft Office 2007
All courses
Microsoft Word 2007
Get Started Add-In Tab
Other courses
Command Reference Guide
Microsoft Excel 2007
Get Started Add-In Tab
Other courses
Command Reference Guide
Microsoft Outlook 2007
Other courses
Command Reference Guide
Free Business Templates and other resources are available at: (click for link)
For compatibility with Office 2007 when using Office 2003 download the file at:
 Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats