I've subscribed to a blues music feed. Seemed like a good idea at the time. Automatically, iTunes downloads the music. But I don't subscribe to any 'radio-type' podcasts. I think, were I a commuter, I may do. I occasionally download a podcast, but it's straight off a website, so it's not 'cast' as such. More like downloading a sound file.

I've created one or two feeble attempts at my own 'radio show' but they're not worth sharing.

This said, I know there is mileage in the enclosure element in RSS feeds, which is where the sound file resides in a proper, automatically, downloaded podcast. If you've more time commuting, or walking the dog, sound is more useful to you. However, I think there is going to be a big, big rise in videocasting. Same feed element, but it's a video instead of a sound file. Though, it will need to be tied in with a torrent server, so that the bandwidth involved in sending out, say a feature film to 100,000 users is feasible.

Imagine watching Eastenders on your computer. I know, I know, you can do that on the telly. But what about the long tail of all those old episodes of Eastenders. Or, the millions of other programmes that aren't on broadcast TV. These are coming.