Who else uses Linux? German automobile maker Audi does. In fact, they are in the process of migrating from more expensive Unix servers to SUSE Linux Enterprise Server (SLES) and hope to be finished in 2007.
“…the company’s IT department chose Linux for three solid reasons: ‘[It runs on] commodity hardware, which is faster; better pricing; hardware-vendor independence.’ ”
This article from Linux.com talks about how Linux is making a difference at Audi.
Here is the official Novell success story for Audi