In 2004 IBM was considering a switch to linux. I hope they are successful with the mac push.

"First, our chairman has challenged the IT organization, and indeed all of IBM, to move to a Linux based desktop before the end of 2005. This means replacing productivity, web access and viewing tools with open standards based equivalents."

http://www.theinquirer.net/en/inquirer/news/2004/01/07/inter...