bjoernvold.com

We have been concentrating on the desktop here but it is worth mentioning that for business purposes this is pretty much a killer combination:
SAP / Red Hat Global Alliance

The SAP/Red Hat global alliance brings together two industry leaders in a partnership that delivers extraordinary business value to customers. Red Hat and SAP have a decade-long technology and engineering collaboration program through the SAP Linux Lab, resulting in comprehensive product support for SAP business applications on Red Hat Enterprise Linux.

Alliance Overview

SAP and Red Hat's partnership enables customers of all sizes to deploy SAP's business application portfolio on the market-leading Linux platform, Red Hat Enterprise Linux.

Red Hat is an around-the-clock, global network of the most experienced, motivated, and knowledgeable Linux open source software support engineers. For joint customers of SAP and Red Hat, the alliances organizations have established a cooperative support agreement whereby customers are assured of receiving best in class support services for their SAP infrastructure running on Red Hat.

Windows? They have hardly been there. This is for the guys that have used IBM AS400.
The security of RedHat that guarantees that it works (or they pay for the damage) makes every business leader warm at heart. And SAP has been around in that market for ages already.
In a big business you need reliable stuff. These will get the job done! What bothers me a bit is that on the client side in those businesses many are sitting on a windows PC worrying about viruses.
A total virus free (Windows free) Linux/SAP concept would let them sleep at night and probably earn them a load of money.