VMware is for rich fools
having used all of the VM systems out there it seems that VMware is there for the rich and lazy. Not only do you pay for any of the useful basics but as your system gets more convoluted, the costings only go up.
compare this to 'free' options such as KVM and XEN - both are just as capable of host virtualisation - but you get some added bonuses for free too - such as being able to monitor (eg via SNMP) the underlying 'metal' via the ring0 host. you can do live host moving (what vmware gives the buzzword vmotion) with KVM and XEN. it just takes , gasp, some knowledge..and horror, command line actions...oh, unless you pay for some fancier GUI options.
oh, these events can also be triggered automatically with scripts if, eg the local environment gets too hot...or the UPS has just kicked in - features that VMware charge for again.
in the current climate, I'd say that any public sector bodies that use our tax money must make a damn seriously hard and good case for using VMware rather than the free options.