Podcasting is a new term that is being used with increased frequency. It’s essentially a combination of RSS (used for desktop news headline aggregation) and mp3’s. The content is entirely dependent on the feeds you subscribe to.
One of the very best is the BBC’s Podcast of “In Our Time”, where Melvyn Bragg discusses matters ranging from the origins of the universe to renaissance art. I’ve passed many an hour with my iPod (note that you don’t need to specifically own an iPod to take part!) listening to episodes whilst travelling. Plenty of other Podcasts exist - it’s rapidly gaining popularity.
Download the software, and hunt out the content. You can’t go much better than the BBC though as it continues to push podcasting, by making The 2005 Reith Lectures available, the first of which is on “The Triumph of Technology” (via boingboing).

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April 8th, 2005 at 4:45 pm
Did you find the URL for the Feed of the Reith Lectures?
April 8th, 2005 at 5:09 pm
Afraid I didn’t get an exact URL for the Feed as such. Shame, as it’d make a lot of sense for the Reith Lectures. So Podcast is probably a bit of a misnomer in this particular case. At least the BBC are making the mp3’s available though: it’s a step in the right direction.
May 18th, 2005 at 9:05 am
More has just appeared here