Virtualization Security Round-up (Updated)

In the End-to-End Virtualization Security Whitepaper we review various aspects of server security with an eye to determining how the products would work together to create a secure virtual environment. While some of these tools are cross-platform, the vast majority of them are geared specifically to VMware vSphere.
In this post we will look at Server Security, and we will follow-up with another post about Desktop Security? Are these very different? I believe so, desktops have daily, second by second user interactions. For desktops, one of the most important aspects is look and feel such as response time for actions. So things need to be as fast as possible. With Servers however, user interactions are limited and therefore have slightly different performance and security requirements. What may be acceptable for a server may not be acceptable for a desktop. So what do the tools provide for servers?