gManZboy writes: "KVM? Isn’t that horse number four in a three-way hypervisor race between VMware, Microsoft and Citrix? Look closely: For several reasons, Red Hat Enterprise Virtualization 3.0, just over the horizon, poses a larger threat to VMware than Microsoft virtualization technology, long-term. One advantage is speed: "The KVM or kernel virtual machine, unlike other hypervisors, is part of the Linux kernel and uses the Linux scheduler and memory manager. That means it can do its work as an extension of kernel operations," as Charles Babcock notes."