From Creative Labs’ ZENCast site:
Podcasts, short for Personal On Demand broadCast, are audio files you can download into any MP3 player or computer.
While I don’t necessarily like the term “podcast” because it is kind of associated with iPods, I’m not going to try to redefine it when it’s obvious to everyone where the term comes from.
*Note: for those who don’t know, Creative Labs makes competing portable media players to Apple, like the recent ZEN release.