The Black Digital blog has posted an extensive screenshot review of the upcoming Exchange Server 2007 Beta. The images speak for themselves and there's very little comment on the whole process.
It is however quite interesting, since this is a major update to Microsoft Exchange. The installation was performed on a virtual machine and the SMTP and NNTP services don't need pre-installing, unlike Exchange 2003 Setup.
Additionally Microsoft Corp. announced availability of the public betas of Microsoft® Exchange Server 2007 and the new Forefront Security for Exchange Server. Exchange Server 2007 builds on the leading e-mail, messaging and calendaring server with new features for improved security, remote and mobile access, compliance management, and unified messaging. Forefront Security for Exchange Server helps provide advanced protection against viruses, worms and spam, and is the first product available under the recently announced Microsoft Forefront brand for business security products.