Pedro writes "Citrix announced today that they are giving away their Xen OSS based virtualization platform XenServer with all the goodies included for free. The big highlights are XenMotion, which lets you move VMs from box to box without downtime, and multi server management. The same stuff in VMware land is $5k. They plan to sell new products for XenServer and also the same stuff on Microsoft's virtualization technology called Hyper-V. It will be interesting to see what VMware does. The announcement comes the day before VMware's big user event VMworld."