Microsoft is slated to make available a limited invitation-only technical preview at WPC, of test build of its Office 2010 suite to select testers via the company’s Connect download site, is of Professional version, of the five planned Office 2010 SKUs only. Microsoft also is making available to select testers, tech previews of Visio 2010, Project 2010 and SharePoint Server 2010, officials said. The tech preview of the Office Web Apps. The five Office 2010 SKUs will be:

-Office Professional Plus 2010 (available only via volume licensing)
-Office Professional 2010
-Office Home and Business 2010 (the new SMB SKU)
-Offie Standard 2010 (only available via volume licensing)
-Office Home and Student 2010

Source:→ All About Microsoft