After sometime Citrix has released its version of Xen. I think what’s very interesting is Citrix licensing model. They have gone for a per-server approach, rather than a per-socket as favoured by VMware and Microsoft. XenServer starts at $600 per server for an annual license, and $900 per server for a perpetual license. Of course “the other virtualization vendors” (read not VMware) have all aggressive pricing strategies which kind of reflect the quality of the product they are offering. In other words -you get what you pay for. But perhaps this is a sign of changes or pressure to come on VMware… If you want to read more about Citrix’s offering, the Register has a round up.