Just found out today that Microsoft Office 2010 Beta is now freely available to the public to download and test.  Along with Office 2010 Beta, you can also grab SharePoint 2010 Beta!

Get Office 2010 Beta here: www.microsoft.com/office2010 

Get SharePoint Server 2010 Beta here: http://technet.microsoft.com/en-us/evalcenter/ee388573.aspx 

Harold Wong