This is a re-posting from the vSphere Security Blog to ensure maximum coverage.
I'm pleased to announce to availability of the official release of the vSphere 5.1 Hardening Guide. The guide is being released as an Excel spreadsheet only. This guide follows the same format as the 5.0 guide.
All reference and documentation URL's and code samples have been updated for 5.1. The guide is available here
The permanent home will be here soon: http://vmware.com/go/securityguides
Also available is a separate document containing the Change Log for the guide. The Change Log is available here
Thanks to everyone who contributed feedback on the Public Drafts and also the team at VMware for their outstanding work in making this guide possible.