Download Microsoft Office Professional Plus 2010 Beta from the MSDN evaluation center: Microsoft Office Professional Plus 2010 and related products offer a business communications and collaboration platform. It presents several exciting advances for developers by offering substantially expanded platform services, a big leap in tools productivity, and longer strides as an open/interoperable platform.
But, before you start to dirty yourself with this pre-release, make sure you read the release notes
Don’t tell me that I didn’t warn you!
Go get it!