It's all in the name. Many companies are using the term podcast to target the podcasting audience. Microphone preferences are subjective and depend on their intended use. Many podcasters use both USB microphones and professional studio microphones. Both can be used for podcasting. The higher the quality sound you are looking for, can influence the need to go up a few notches in price range. USB microphones (also called podcasting mics) are good choices for those looking for basic, plug-in and record, without the need for pre-amps, processing, etc., as in professional voice-over studios. Sorry for the long answer, but trying to cover enough ground.