http://www.microsoft.com/office/preview/beta/testdrive.mspx
Included in the test drive:
Microsoft Office Access 2007
Microsoft Office Excel 2007
Microsoft Office InfoPath 2007
Microsoft Office OneNote 2007
Microsoft Office Outlook 2007
Microsoft Office Outlook 2007 with Business Contact Manager
Microsoft Office Outlook Web Access
Microsoft Office PowerPoint 2007
Microsoft Office Project Professional 2007 Microsoft Office Publisher 2007
Microsoft Office SharePoint Designer 2007
Microsoft Office Visio 2007
Microsoft Office Word 2007
Microsoft Windows SharePoint Services (coming soon)
Microsoft Office Project Server 2007 (coming soon)
Microsoft Office SharePoint Server 2007 (coming soon)