Gartner has released their report on Exchange 2007 and how it could set the future of email. Some highlights included are unified messaging services, mobile services and hosted exchange.
Once you work with some of these features, you will find them to be very powerful and you may find yourself wondering, "How did life exist before Exchange 2007?"
Overall I think that Gartner missed the boat on a few key points in the article, but did provide the counterpoint to a core application in many businesses' infrastructure. The paper is a decent read and gives some relevant information about the products history, lifecycle and a look into the crystal ball for Exchange 14.