kernel virtual machine (kvm) virtualisation
There is yet another virtualisation technology on the block !
http://www.vizzr.info/2007/04/24/kernel-virtual-machine-kvm/
kvm only run on processors that supports x86 hvm (vt/svm instructions set) whereas Xen also allows running modified operating systems on non-hvm x86 processors using a technique called paravirtualization. kvm does not support paravirtualization for cpu but may support paravirtualization for device drivers to improve I/O performance.
kvm FAQ
Proprietary vendors take note :
Xen and kvm make use of Intel-VT and AMD-V hardware virtualisation features !