If you have been trying to explore things, which go beyond Windows, you would have definitely stumbled upon OpenSolaris. Based on Solaris, history of OpenSolaris goes back to early 80's. Solaris, which is known as an operating system for servers, was brought to desktop computers through Project OpenSolaris and offers features such as DTrace, ZFS Filesystems, Predictive Self Healing & SMF and Virtualization with Zones. OpenSolaris is available for anyone to download for free and use on their commodity hardware. With many advance features and reputation of being a scalable and stable operating system, Solaris and its open-sourced release OpenSolaris, is now a very popular as a general purpose operating system platform.
Digit, in its February issue, has a Fast Track to OpenSolaris which starts from introducing you to OpenSolaris and goes on to explain how to do contribute to OpenSolaris by doing projects in OpenSolaris community. A quick reference guide to key OpenSolaris features (ZFS, and DTrace) is also a part of the Fast Track. And to make things more interesting, Digit is also running the OpenSolaris Geek Hunt Contest, which is open for anyone to participate! Just take the quiz at http://www.thinkdigit.com/
All you need, in order to participate in this quiz, is a valid email address. If you want to brush up your skills on OpenSolaris, then check out http://www.thinkdigit.com/