Inspector Sands13,963 posts since 25 Aug 2004
What always surprises me is when I download a podcast and it has a locally targetted advert in it.

It's a single mp3 file so how does that work, is the server creating it on the fly as I download it?
Steve in Pudsey10,411 posts since 4 Jan 2003
Yorkshire Look North (Yorkshire)
Basically yes. It's not particularly difficult to point the the RSS feed to a PHP script which geolocates the client and either returns one of several pre-compiled variants or takes the individual segments of the podcast and concatenates them with the appropriate version of the ad.
Write that down in your copybook now.
Inspector Sands and Ste gave kudos