In the 2.6.20 kernel we were presented with KVM (Kernel-based Virtual Machine) virtualization, and now in the Linux 2.6.21 kernel will mark the introduction of VMWare's VMI into the Linux upstream kernel. VMWare's kernel component will allow for para-virtualized operating systems to run within virtual machines. VMI is short for the Virtual Machine Interface, which was introduced in July of 2005. More information on the VMI Linux 2...