Product Use Rights
Microsoft Volume Licensing - Build a Customized Product Use Rights Document (dead link)
Licensing for Virtual Environments (dead link)
Volume Licensing Briefs:
Reimaging Rights Applies to all Volume Licensing Programs
Licensing Microsoft Server Products for Use in Virtual Environments Applies to all Volume Licensing Programs
Microsoft Volume Licensing - Microsoft Services Provider License Agreement (SPLA) Program
Exchange Server 2007 Editions and Client Access Licenses
How to Buy Exchange Server 2007
Exchange Server 2007 Licensing Frequently Asked Questions
Microsoft Office SharePoint Server - How to Buy
Microsoft Office SharePoint Server - Editions
Microsoft Office SharePoint Server 2007 frequently asked questions
SharePoint licensing - a common question I get asked...
Licensing Windows SharePoint Services
Using Windows Sharepoint Services as an Extranet