I have posted the following in the vSphere Security blog. It is being cross-posted here to get maximum visibility and as an FYI

vSphere 5.1 Hardening Guide Release Candidate now available

I would like to announce the release of the Rev B/Release Candidate for the vSphere 5.1 Security Hardening Guide.  This guide should be functionally complete and has been posted for your review and your feedback.

We’d love to hear your feedback, good and bad, on the contents of the guide. I would encourage you to post your reply in the Security and Compliance Communities forum but if you have more sensitive concerns, send it to me at [email protected]. The intent is to publish the final GA copy in two weeks with any changes/updates incorporated so get your inputs in as soon as possible!

The vSphere 5.1 Security Hardening Guide has been posted to the VMware Communities in the “Security and Compliance” area, in the Documents tab. A separate Change Log document has also been published with the RC Guide.

Thanks to everyone who provided feedback on the Rev A Draft, and also to the team at VMware who contributed to this guide in many significant ways.

Thanks,
mike foley