http://www.microsoft.com/office/preview/beta/testdrive.mspx?showIntro=n

Just for my readers…a FREE test drive of the new Microsoft Office 2007!  This is BETA, but you are live in the applications.  Test the new versions of Excel, PowerPoint, Word, Outlook, and many more! The tutorials provide lots of new ways to work in Office 2007.  You can explore the new versions of Office in this fully functional Test Drive environment.  Try this before downloading the new beta versions to your computer.  Most other support applications like ACT or Quickbooks aren’t ready for 2007, and you don’t want to hose your mission-critical business systems.  So try it—no risk—in your browser instead.