Don't know of any myself, but then I don't really do podcasts!
Note for others, the name is a bit confusing, you don't need an ipod to listen to a podcast, a computer with internet access and speakers is all you need. There are a few different applications out there, I think I played with one called Juice. It's nice that you can just set it up and it just keeps on picking them up and you can play them back at your convenience. So don't be put off from trying them assuming you can't do it if you don't have an ipod!
Anne