I'll be hosting the next (146th) Carnival of the Godless on August 15. You can submit entries using the submission form. The previous carnival can be found at Cubik's Rube.
The link to the submission guidelines is broken: from memory the guidelines are that articles from theists and nontheists alike are welcome, but articles should be about atheism, agnosticism or nontheism, and/or be of interest to a predominantly atheist/agnostic/nontheist audience. I can't speak for other hosts, but I myself will silently reject articles that don't meet these broad criteria, and think a few black thoughts about submitters who inconsiderately waste my editorial time with articles and spam of interest only to the religious.