As Windows 8 consumer preview is scheduled to be released later today, the consumer preview guide for business is available for download which discusses features related to the User Interface, app development, start screen, touch-first experience,form factors, Internet Explorer 10, mobile productivity and some security features. Here is what the download page details about this download-

The Windows 8 Consumer Preview Product Guide for Business provides a detailed look at the many new and improved features in Windows 8. The guide is designed as an accurate source of information that can help businesses understand how Windows 8 enables users to be ready and productive practically anywhere, allows for a personalized user experience, and provides IT with more secure, easy-to-manage intelligent infrastructure.

You can download the guide from here