On Monday 24th July Microsoft shipped Exchange Server 2007 Beta 2 to the general public, available here through Microsoft TechNet. Also announced was Microsoft Forefront Security for Exchange Server (Beta 1), which I will be reviewing in due course.
Last year Microsoft announced that Exchange Server 2007 will ship only in x64 version, their argument being that 64-bit hardware brings numerous benefits to running Exchange, and that most servers shipping today already include 64-bit hardware.
Black Digital