I was just e-mailing a customer about exchange deployment; after they watched one of my webcasts. Wanted to share the deployment documents I dug up:
Exchange Server Version Comparison
Deploying a Standard Exchange Server 2007 Organization
Deploying a Simple Exchange Server 2007 Organization
Deploying a Large Exchange Server 2007 Organization
Deploying a Complex Exchange Server 2007 Organization
Home page for Exchange - http://www.microsoft.com/exchange/2007/default.mspx