Expensive Hypervisors - a bad idea even if you can afford them
Here is a great post from James O'Neill.
As Microsoft get ready with Hyper-V, VMware are beginingg their marketing blitz in an attempt to justify their pricing. As James points out in his post you can manipulate figures to come to any conclusion you want ... even if its way off base. Microsofts Hyper-V will cost a fraction, per socket, when compared to VMWare. While the VMWare products are slightly more mature Hyper-V is only a small part of the Virtualisation offering from Microsoft. Windows Server 2008 really brings Mircosoft virtual offerings to the forefront as an end-to-end solution. Check out https://www.microsoft.com/virtualization/default.mspx for more details.