Others have said it more effectively than I can express. So, by way of introduction, here is a short selection of articles about the podcasting phenomenon.
When you create a series of podcasts, you are also in search of an audience. So, RSS feeds look like a simple way to allow others to use your content to enhance their website, and promote yours.
However, some podcasters have noticed that there is a drawback to this process.
What happens if a site that feeds off your content becomes more popular than you? What if it's that site which search engines point to as an authoritative source for your podcast rather than your own?
That's when you know you've been podjacked!
So far, this has only affected a small number of podcasters. But, obviously to them, it'sa marketing catastrophe in the making.