Exchange Server 2007 Hosted Trial
In case you missed this, you can now try all the exciting new features of Exchange Server 2007. Just go to Exchange Server 2007 Hosted Trial and sign up for a demo account. Briefly after that you'll get an email with login credentials which allow you to "feel" the new Outlook Web Access and also "talk" to Exchange Server.
"Welcome to the Microsoft Exchange Server 2007 Hosted Trial Web site. You can create a temporary account to experience the features of Exchange Server 2007 which will stay active for 5 days. Your account will be pre-populated with sample messages, calendar appointments and contacts to help you have a rich experience. You will be able to send and receive mail, schedule meetings, and adjust your options. You can access your account via Microsoft Outlook Web Access, Microsoft Office Outlook, or an Exchange ActiveSync compatible application."
And the service is implemented and hosted by Unisys, my new employer since last Monday ;-)