If we speak about servers, Linux is the king
It is really interesting that many people defending Novell-MSFT deal are using same patterns of sentences and words. Has Web 2.0 marketing come that far?
You use Linux because you choose NOT to use MSFT products, genius. Not like Linux is some accompany Windows utility software. You choose Windows, Linux, BSD, OS X, AIX over some solution. It is up to the MSFT to make their products work, not up to Linux scene. If they don't work fine with Linux, they will be eliminated. No need to buy/bribe CEOs etc. for that.
Linux on servers is de-facto standard, others including IBM, MSFT and even FreeBSD is trying to convince companies to use their solutions. It is NOT Desktop, Linux is the indisputable king on server scene. It is not a favor or anything, you HAVE to make sure your product works with Linux or you are a joke on enterprise.
Just like OS X, it can be called minority but for multimedia scene, if your product doesn't support OS X, you are a joke.