If you are curious about the new features of Microsoft Office 2007, there is now a Public Beta available, that will allow you to use Office 2007 Beta 2 and its components (Visio, Publisher, Outlook, Word, Excel, etc.). It has a brand-new interface, and places much more emphasis on collaboration.
You can obtain it and the beta keys here: Microsoft.com – Office Preview.
eWeek.com has an extensive review/look at Office 2007 beta 2:
eWEEK Labs’ evaluation of Microsoft’s Office 2007 Beta 2 unearthed compelling features and tools, and reminded us why enterprises continue to rely on the productivity suite.
During tests of the second beta of Office 2007, we were impressed with the suite’s collaboration features. In fact, we believe they will be the impetus for dedicated Windows shops to upgrade when Office 2007 ships later in 2006. The suitewide attention to collaboration will enable users and enterprises as a whole to work with information in new and more creative ways.