Shure – one of the leaders on microphone manufacturing – has several episodes of their podcast (or Shurecast as they call it) on their website. I’m listening to the episode on SM58 and SM57 as I’m typing this. While they’re plugging their own products a lot, there’s also a fair share of information.
Some of the more interesting parts includes the drop test, the military connection, and the difference between the SM57 and SM58. They’re talking mostly about musical application and the microphones in general, but their microphones can certainly be used for podcasting… As you might know