A podcast's a series of digital media files, usually either digital audio or video, that's made available for download via web syndication. The syndication aspect of the delivery's what differentiates podcasts from other ways of accessing files, such as simple download or streaming: it means that special client software applications known as podcatchers (such as Apple Inc.'s iTunes or Nullsoft's Winamp) can automatically identify and retrieve new files in a series when they're made available, by… (More on Podcast)