You should! Ophelia Benson is already in it, and I just got the latest issue, which boldly announces in a banner across the top, “NEW COLUMNIST: PZ MYERS”, so I’m entirely self-serving when I say you should send them money.
It really is going to be a regular thing — I just sent off column #2 this past weekend. I think I get to eventually post the columns here, but only after a long lag to avoid undercutting the magazine. Which is silly, though: if you’ve ever seen Free Inquiry, you know it regularly features a large collection of interesting writers — Wendy Kaminer, Susan Jacoby, Christopher Hitchens, a whole bevy of that ilk — and you ought to be getting it to savor the whole magazine.