Some of the latest announcements involve these:
Symantec and VMware Deliver Extensive Protection for Virtual and Cloud Environments
VMware also recently released a statement with comments from many of it's security partners showing that there is a lot going on in the security eco system:
I guess we have exciting times ahead.
Lately I have been working with Trend Micro Deep Security, a product that does a lot of different things in order to detect, protect, monitor and report on security issues. I will try to provide a more detailed posting on this topic later.
The topic of the discussion on episode 79 of the Virtualization Security Roundtable is "RSAC/Bitdefender" and covers many of these same things.