Currently for my blog, thatLinuxguy.wordpress.com, I'm working on a series of terminal tutorials, then going into shell scripting, into TCP/IP networking after that, and then going on with the install/config and administration of server apps, such as BIND, Apache, Sendmail, MySQL, Squid... etc. Unfortunately, these types of articles are more suited towards SysAdmin's readers rather than MaxPC. I could see a lot of people being interested in a small Linux media server/player, or a light-weight Linux firewall. I'd be more than willing to work on non-sysadmin type articles is I could get a few in MaximumPC.
I don't believe all of our reader base are gamers. It's probably a large portion, maybe even most of it, but I think we have a lot of techies here that are just basic users who happen to love computers. Modern Day Linux distros are goldmines of cool, easily available, free software for most intents and purposes. Linux is awesome for people who don't play games.
I'd also be willing to write my reviews of newest distros from all the major camps. Also, the noteable releases from Gnome, KDE, the Linux kernel, and other popular apps.
And I think many MaximumPC users who're interested in Linux should give the terminal a good go. If not for a better understanding of how a computer works, or how to get lots of tasks done quickly and effiently, than for PizzaParty. Order a pizza while you code!