The Security and Compliance team has made available the release version of the Windows Vista Security Guide. This is great resource to deploy Vista in a secure manner. Windows Vista is more secure than Windows XP out of the box but this guide helps you to further harden Vista.
The document outlines major security related countermeasures available in Windows Vista. Two Windows Vista Security configurations are thoroughlt documented in the guide that you can create using the new GPO Accelerator Tool which comes with the guide:
Specialized Security – Limited Functionality (SSLF). Concern for security in this environment is so elevated that a significant loss of functionality is acceptable. Microsoft only supports Windows Vista Enterprise and Windows Vista Business for this environment.
Group Policy–based security setting configurations for Windows
Recommendations to help you make well-informed security setting choices, thanks to detailed comparisons between the Windows Vista out-of-the-box security configuration, and the EC and SSLF setting configurations.
The GPOAccelerator tool that you can use to automate the creation of the recommended Group Policy security setting configurations.
So check out this great resource for deploying Vista in a secure fashion!