But with respect to virtualization, which is also a "hot topic", are these servers running something like either VMWare ESX/i or Hyper-V, with a bunch or guests running on top, and managed with vCenter or the MS equivalent (or even something more fancy given the number of servers) or...
Are they running OSes like Windows Server Datacenter right on the metal?
Is there a trend?
A couple months ago I heard Ron Bowman speak and that kindled my interest in this. This wasn't the conference but he talked about the same things (cost, location, etc.):