Exchange Server 2007 Unified Messaging Video
This video describes the Unified Messaging opportunity for partners in Exchange Server 2007.
Get it here: http://www.microsoft.com/downloads/details.aspx?FamilyID=1CFB4779-B760-4884-8146-53997C802B65&displaylang=en
Ice Rocket : Exchange Server 2007, UM, Unified Messaging