Oracle VM Server similar to Sun xVM Server
Author writes, "Oracle VM Server 2.2 is distributed for free, as is the new V2V conversion tool for VMs created to run on Virtual Iron hypervisors... But support for the Oracle hypervisor is not free."
Bundling Xen into Oracle Enterprise Linux and charging only for the support is a similar model that Sun took with bundling Xen into Open Solaris and only charging for OpenSolaris support.
Things will be interesting if the Sun purchase by Oracle is approved!