NILICULE  This is an absolutely brilliant piece of software, both for beginning as well as advanced podcasters. Quickly setting up a podcast is a breeze and the ability to check what the final podcast will look in the iTunes music store is extremely handy.

Podcast Maker let's you create your podcast and enhanced podcast with drag and drop. Creating various chapters for your podcast is as easy as just dragging a marker around on the timeline and the program lets you zoom in for extra precision. When creating an enhanced podcast, Podcast Maker will do the M4A conversion for you automatically. Couldn't be easier!

You can publish your podcast to a variety of accounts (.Mac, FTP, SFTP) and it'll import existing podcasts if you choose to do so.

Even if you're just getting started in podcast making, this is a $30 very well spent!  
(Version 1.3.8b)