Just spotted this really useful doc from our own Microsoft IT department :Managing Windows 7 and Windows 8 Side-by-Side, Recommendations and Best Practices for the Enterprise from Microsoft IT
“This white paper discusses the planning, line-of-business application compatibility, imaging, security, and backend system considerations and experiences of the Microsoft IT team when managing desktop and laptop machines running Windows 8 and Windows 7 within the same corporate network”
including information on:
Planning and Preparation Considerations for a Mixed Windows 7 - Windows 8 Environment
Internet Explorer Considerations.
Backend Systems Considerations.