After the News that the bomb had been launched by Virtualization.info:

http://www.virtualization.info/2009/02/citrix-xenserver-is-now-free-xencenter.html

Citrix has officially released their enterprise version for free check out the announcement at Citrix XenServer Enterprise for free:

“First of all Citrix is releasing for free the Enterprise Edition of XenServer.

This is not a scaled down, limited version of the Hypervisor. From the end of March on, there will be only one edition of XenServer which will be free.

Secondarily, Citrix is giving away for free with a remarkable number of XenServer enterprise features, including the Enterprise Console to manage multiple hosts (XenCenter), the live VM migration (XenMotion) technology, the resource sharing (Resource Pools) technology and the enterprise storage management technology.