Podcast Maker is a tool for Mac OS X that makes podcasting simple.

The tutorial video at www.potionfactory.com/podcastmaker/ shows how fantastically easy it is to create a Podcast from an exisiting mp3 recording. It produces the XML code to go with your recording. What it doesn't do is register the podcast with iTunes. You will need to do that yourself manually.

It allows you to make enhanced podcasts with chapters and integrated graphics.