Hi, this is Kevin Allison, and I lead the User Education group within the Microsoft Exchange product organization. I am pleased to announce that the beta documentation for Exchange 2007 has just been posted to the Microsoft Exchange Server TechCenter! http://www.microsoft.com/technet/prodtechnol/exchange/E2k7Help
As Microsoft prepares to release Exchange 2007 Beta 2 for your testing, you may now begin reviewing the beta of the documentation set. You may notice a significant number of changes from our Exchange 2003 docs. This is a direct result of work done based upon your feedback. My goal is to make the documentation and other Exchange-related content as useful as possible to help you be successful with Exchange. As with other content we publish to the Exchange TechCenter, you can readily rate and comment on specific portions of the documentation. We will be publishing updates to the content through release - usually about every six weeks - and beyond.
Going forward we will provide regular updates on the changes we are making to improve the Exchange content story. Please take a look at the beta docs and let us know what you think.