If you've been thinking about writing for the Dispatches from the Word Mines series, now is a great time. In terms of general parameters, I have few. I ask that you be working in your craft and have something to contribute to a conversation about writing, whether it be instructional or promotional. I also want a bio and any associated images you'd like added to the post. I don't mind the occasional bit of colourful language, and I don't mind publishing instructional or promotional posts containing adult content (I'd shy away from hardcore pornography, but writing about or promoting erotic fiction is just fine). Finally, I can't use posts about fictional religions right now (I've published quite a few of those already), and the Dispatches series really isn't the place for a broad survey of your work or career. However, I'd gladly accept a post about writing Christian, Pagan, or Buddhist SF (or any other sort of religious SF), and I'd gladly promote your shiny new novel or collection.
You can reach me here if you're interested: http://csmaccath.com/contact