SUSE is a distribution of Linux, similar to RedHat and Debian. I've never used SUSE. But I've heard alot about it from other engineers. I think I'll give SUSE a shot next time I need an operating system.
SUSE was purchased by Novell late last year. I'm not completely sure what Novell hopes to do with it. Except perhaps Novell came to realize that Linux was better than their proprietary operating system, NetWare. At any rate, you can still download SUSE for free from Novell's web site (the link on the left).
What's really cool about Novell purchasing SUSE is that Novell also purchased a software company called Ximian. Ximian's biggest product is Evolution. Evolution is an Exchange client (Exchange is the Microsoft email protocol that almost every company in the world uses).
Novell can bundle Evolution with SUSE. You can download it, install it, and have it be just like Windows, all for free. So, hmmmmm, let's see... Windows costs my company XXXXX dollars per year... if my company were to use something just like Windows that costs zero dollars per year... if I were a CEO at a company who's looking to save money, I might look into SUSE.
Good for Novell, they also sell really expensive servers that you can purchase along with that free desktop software.
I'm willing to bet Novell does pretty well over the next 5 years. As I write this, Novell's stock is at $9.20. Let's check back some time from now and see if I'm correct.