90% of the linked article is a waste of bytes. Here's a summary of the other 10%

VMWare released a patch to address a critical vulnerability in the virtual machine display function that might allow a guest operating system to run code on the host. http://lists.vmware.com/pipermail/security-announce/2009/000...

That's about it. There's also two barely related links to

http://www.invisiblethings.org/papers/redpill.html and http://bluepillproject.org/

The first one is a technique for detecting the presence of a hypervisor, the second I can't quite figure out, but it appears to be a kind of hypervisor.