Our organization has 230+ virtual servers out of 720+ servers. We are constantly looking to virtualize machines as hardware reaches end of life. Rather than buy new hardware we virtualize as much as we can. This is organization wide for us.
As opposed to the previous answer, we are currently using server virtualization only in development and testing environments, and only in IT department so far.
Chances are that we will be virtualizing production servers in the near future.
We are still playing around with it in our dev environments but plan on rolling it out later this year at more of an enterprise level. A lot depends on infrastructure spend this year.
We are looking at keeping our current servers, and adding virtual servers and virtualizing the majority of our desktops. A recent virtualization conference opened our eyes to new possibilities including having 30+ live virtual machines simultaneously running on a single server. The machines we use now require maintenance...granted not much generally, but enough workstations add up. We are thinking about throwing in thin clients in place of all the workstations. A linux distro will sit on the clients, and on login, an automatic RDP to the windows machine.
Virtualization hasn't gone into production just yet, we have a few projects in development to incorporate it. Virtualization reduced the price of purchasing the extra hardware required. In the future, we are planning on virtualization servers as we need them, and I'm rooting for Microsoft because VMware support is making me pull my hair out.
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We have started implementing virtual server's (vmware) about six month's ago we have most 80% of our server's virtualized now .So far so good
We are looking into using thin client's virtualized for our desktop's not sure yet need to educate ourselves with it Anybody doing this yet with end user pc's?
We're a large pharma with around 7,500 Windows servers and about 1500 UNIX/Linux platforms. Our MS environment is heavily (70%) virtualized. We are also virtualizing much of our UNIX/Linux infrastructure and probably have finished 40% of that. We use Sun Solaris 10 zones widely. Our SAP prod/QA/test/dev is all on 6 HP SuperDomes with vPars for prod and HPVM's for the rest. Virtualizing ORACLE is a problem - they won't support any virtual environment but their own. We're starting to virtualize RHEL as well. The main problem with virtualizing UNIX & Linux is patching. Getting an outage for the apps on a server can be tough. If it's a virtual platform with 10 zones on it, it's 10 times as difficult.