What if instead of having just one or two people you expected to write articles, what if you accepted articles from anyone who would want to write them. You'd just need someone to review them and post them for you (kind of like an editor) or maybe even two people do that.
I'd volunteer for that job. Heck I'd write articles for you, but you said you wanted a commitment of one per week, and I just don't think I'm that interesting. (Maybe one a month).
Anyway then you could solicit articles instead of writers. For example, with Skyrim being fairly new you could ask specifically for some Skyrim articles, and maybe have an incentive for well-written articles.
Just a thought anyway.