I thought the main difference might be that podcasts (and the reason putting up mp3 files/tunes/journals/speeches etc on the web is now being referred to as "podcasts" ) is that podcasts can be integrated with itunes (or even yahoo podcasting etc) and downloaded on to ipods, nanos, shuffles etc.
The introduction of the Wikipedia article on Podcasting does a nice job of dancing along the distinction... "Podcasting" in its strictest sense is distinct from other types of online media delivery because of its subscription model, which uses a feed (such as RSS or Atom) to deliver an enclosed file... [SNIP] since computer jargon is frequently misused, the word "Podcast" is frequently used to describe the posting of any link to a media-player-compatible audio file (typically MP3) on a website." http://en.wikipedia.org/wiki/Podcasting Pete Welsch - pwelsch@indiana.edu --------------------------------- http://sampo.stderr.org