...familiar with working in the robust, conservative mainframe world, took a lot of persuading when he decided to install virtualLinux servers on his IBM mainframe using Big Blue's Z/VM technology. Adam Jollans, IBM's worldwide Linux strategy...
http://www.computerweekly.com/Articles/2004/03/09/200761/ready-to-roll.htm
...replacing 70 Sun servers hosting customers web sites. Initially the mainframe will provide 1500 customers with their own virtualLinux servers, although the mainframe can support up to 30,000. Telia claims it will now take five minutes to install...
http://www.computerweekly.com/Articles/2001/05/22/180120/divide-and-conquer.htm