A podcast is basically an internet-based radio show which podcasters create, usually in the comfort of their own home.
They need only a microphone, a PC, and some editing software. They then upload their shows to the internet and others can download and listen to them, all for free.
Using technology based on XML computer code and RSS – Really Simple Syndication – listeners can subscribe to podcasts collected automatically in a bit of software, which Mr Curry has pioneered.
The latest MP3 files of shows can then be picked up by a music playing device automatically.