About 2 months ago I started a new website for science podcasters called
SCIENCEPODCASTERS.ORG. It is a group blog where science podcasters can post announcements, show notes, and links back to there sites.
It is a good place to find science podcasts, and I hope it will be the beginning of a community.
If you have a favorite science podcast, I hope you will encourage them to visit the site and send me email at docartemis at gmail.com is they want to join.
Here is the link: http://sciencepodcasters.org