Ask Slashdot: Linux in the Corporate Workplace?

Samantha Bonsak would like to query you all on this issue: "I'm trying to find information reflecting the use of Linux within the corporate marketplace; who is using it and for what purpose. I've been hovering around the Slashdot site for a while and haven't seen any links or references regarding this. Can you point me in the right direction?" For the most part, I think that if Linux is being used in the average corporate workplace, then it is done so on the sly, but it would be interesting to know what other corporations are actively supporting Linux (aside from the usuals like IBM, Intel, Caldera, Corel and Netscape...) - Is there a way to get such information?