With new look for the Office Portal, Microsoft released couple of beta versions of Office 2010. You can download beta release of the software from TechNet or MSDN or you can try Office Web Apps if you do not want to install anything on your computer.
Versions available for download are:
Office Home and Business 2010 beta (Word, Excel, PowerPoint, OneNote, Outlook, and Office Web Apps)
Office Professional 2010 beta (Word, Excel, PowerPoint, OneNote, Outlook, Access, Publisher and Office Web Apps)
Office Professional Plus 2010 beta, Volume License Only (Word, Excel, PowerPoint, OneNote, Outlook, Access, Publisher, Infopath, Communicator, SharePoint Workspace, and Office Web Apps)
These links are for general population download, they are not “live” yet as Microsoft released beta version for MSDN and TechNet subscribers for now.