Tim, i've actually been going through your xml and rewriting it so that it will validate, but still contain everything you were needing to pack in there. I'll email it to you when I'm done and you can compare the two. If you want to use the one I've rewritten, then it will be a good starting point for adding to with future episodes.
This whole xml thing can really be a pain....
Jon
TreeLine Productions
Fort Collins, CO USA
Currently producing these popular podcasts:
"The Rest of Everest" Video Podcast *Voted as one of iTunes' "Best of 2006" podcasts
*Nominated for "Best Video Podcast" in the 2007 People's Choice Podcast Awards
http://www.therestofeverest.com
"Beyond the Movement: The Pilates Podcast"
http://www.thepilatespodcast.com