Apologia "is a friendly forum for both theists and non-theists to come together in search of some common understanding. Rather than a contentious debate format, Apologia provides a setting in which all participants can discuss without confrontation." Sometimes I wish there was a little more confrontation, but they are producing new content all too rarely these days.
Brain Science Podcast is "the show for everyone with a brain" by Dr. Ginger Campbell, MD. We understand Dr. Campbell is taking a break this summer but we hope she returns this fall.
Polyschizmatic Reprobate's Hour is produced by J. Daniel Sawyer, "a hat-wearing, obsessive-compulsive autodidact." He is also a science fiction writer who offers several of his stories as lavishly produced podcasts. Sawyer is also one of the non-theists at Apologia.
The Skepchick "podcast appears irregularly with interviews, discussions, and assorted skeptical goodness." Just not often enough for my taste. The production values totally eclipse the more casually assembled and still massively entertaining Skeptic's Guide to the Universe and The Skeptic's Guide 5x5 on which head skepchick Rebecca Watson also appears (and more frequently).