Questo riguarda i "grandi" utenti... ma non finisce qui...
I did some looking around, and found the following snippet on the Microsoft TechNet Ireland Blog:
Windows Server 2003 Datacenter Edition – Unlimited Virtualization and Volume Licensing
Big anouncement today at the World Wide Partner Conference in Boston - Andy Lees will announce changes to Windows Server 2003 R2 Datacenter Edition (DCE) making it the easiest and most cost-effective choice for large-scale virtualization of Windows Server. Microsoft can now offer our customers unlimited virtualization rights and easier purchase options through Volume Licensing.
Changes that come into effect October 1, 2006 include:
DCE will be available through Volume Licensing: For the first time, Microsoft customers will be able to purchase Windows Server Datacenter Edition through Volume Licensing.
Unlimited Virtualization Rights: Servers with Datacenter Edition will have license rights to run an unlimited number of virtualized Windows Server instances. By simply licensing the server’s processors with Windows Server Datacenter Edition, customers will be able to run Windows Server Standard, Enterprise, Datacenter Edition or a mix of the three editions without having to track the number of virtual machines or pay for additional Windows Server licenses.
More Options to License from OEMs: Customers will be able to purchase Windows Server Datacenter Edition preinstalled on servers with 2 to 64 processors with or without The Datacenter High Availability Program.
Fonte: Data Centre (and unlimited Virtual Machines) to be available under Volume License