A few days ago Microsoft eased the hardware requirements to be able to use Windows XP Mode in Windows 7 and now they are providing some info on how small and midsize  businesses can deploy it in their organization:

Windows XP Mode provides a virtual Windows XP environment in which small and midsize businesses can run many Windows XP-compatible business and productivity applications. Windows XP Mode is a benefit of Windows 7 Professional. Ultimate, and Enterprise and allows organizations to take advantage of new features in Windows 7. This white paper describes how organizations can customize and deploy Windows XP Mode to multiple computers.

Deploying Windows XP Mode