I've been enjoying a new podcast on the TWIP Network called Inside the Lens. Hosted by Canadian photographer Don Komarechka, the show looks at some of the more technical aspects of photography in a decidedly non-technical manner. The subjects of the first four episodes have been early digital cameras, the science of color, electron microscopy and infrared/ultraviolet photography. If you're want to have your mind expanded, check it out. If you want to look at pretty pictures, check out Don's snowflake-a-day posts on Google+, Flickr, Facebook, Twitter and 500px (follow the links on his home page).
Don has gone independent with a new podcast called PHoto Geek Weekly. Check it out if you're so inclined. All of his old Inside The Lens podcasts are available on that same site.