The IEEE has quite a selection of resources for keeping up with technology, trends and history.  Here are a few of the resources that I have found helpful. 

All of these podcasts, should provide an mp3 version and are free for download.  I find podcasts a great resource that I can listen to while driving.  (Under most conditions)

If you are using iTunes for your music management, most of the IEEE podcasts can be found through the iTunes store.  Through that interface, search for IEEE.  At this time there are 14 IEEE podcasts available.