There's an alternative plugin called Blubrry PowerPress http://www.blubrry.com/powerpress/ which has an easier to use and configure interface, works with the FeedBurner FeedSmith WordPress plugin and the Custom Podcast Feeds work directly with FeedBurner (no need to use the FeedSmith plugin for the Custom Podcast Feeds.option).

http://innerseduction.com/how-to-use-wordpresspodpress-to-podcast-to-itunes-032009/

This was very helpful, but it wasn't really clear as to whether I need to fill out the description/title/summary etc. info in Feedburner or in Podpress.

Cool thank you :)