This Week in Amateur Radio This is the premier ham radio podcast with content that appeals to the general ham community. http://www.twiar.org
ARRL Audio News This is the audio version of the ARRL Letter. http://www.arrl.org/arrlletter/audio/
Long Delayed Echoes Jeff KE9V does a great job of covering stories about ham radio with historical interest. http://ke9v.net/podcast-information/
Dits and Bits Randy NV0U provides an interesting, free-form discussion of ham radio topics. http://nv0u.libsyn.com/
Ham Radio Podclass This podcast will prepare you to take the Technician Class ham radio exam at an FCC Volunteer exam session. It is also interesting to listen to as a refresher course on ham stuff. http://www.hamradioclass.org/
Let me know if you find any others.
73 Bob K0NR