Hmm, let's check out Web Servers. The 'break in' market Windows Servers were using to get into the server room. Let's ignore the fact 90% of large databases and other apps are on mainframes or Unix big iron..
http://news.netcraft.com/archives/web_s ... urvey.html
Developer December 2005 Percent January 2006 Percent Change
Apache 52025380 69.97 50502840 67.11 -2.86
Microsoft 15557786 20.92 15510953 20.61 -0.31
Sun 1881861 2.53 1879856 2.50 -0.03
Zeus 577384 0.78 561524 0.75 -0.03
So, despite giving away IIS and pushing it haughtily on to their partners, MS still is completely pwned by Apache, which runs on Sun/Linux primarily. Again, this was MS breakthrough app they were going to push everywhere.
So much for them and servers. Also, more and more companies are adopting Linux, especially as IBM pushes it.
More...