JohnR : Useful Exchange 2007 Links (including a Visio Template)

Tools and Guides:

Many new tools and guides were updated or released in November and December

Microsoft Office Visio Stencil Containing Shapes for Microsoft Exchange Server 2007 This download contains a Microsoft Office Visio stencil with shapes for Microsoft Exchange Server 2007
Introduction to the Exchange Management Shell This download contains an introduction to key Exchange Management Shell features.
Microsoft Exchange Server 2007 Transport Server Role Architecture Diagrams This download contains architectural diagrams of the Microsoft Exchange Server 2007 transport server roles.
Exchange Server 2007 VHD This download comes as a pre-configured VHD. This download enables you evaluate how Microsoft Exchange Server 2007 and Microsoft Office Live Communications Server 2005 together can help create an optimized messaging system for your organization
Intelligent Message Filter Operations Guide This guide provides overall operational information to help optimize the performance of Exchange Server Intelligent Message Filter.