This post is work in progress.
Here is my first set of resources:
Tech Specs for an iTunes compliant podcast
http://www.apple.com/itunes/podcasts/techspecs.html#_Toc526931694
http://phobos.apple.com/static/iTunesRSS.html
iTunes Podcasts FAQs
http://www.apple.com/itunes/podcasts/faq.html
A working example
http://tuscany.podtravels.tv/feed/
WordPress documentation
http://codex.wordpress.org/Podcasting
Feedburner
http://www.feedburner.com/
I actually got it working by using feedburner, it was very easy, just followed the instructions on feedburner.com, my podcast feed is: http://feeds.feedburner.com/RobertStrobl
In iTunes, go to the advanced > subscribe to podcast and enter my url, and you’ll stay in touch with my video podcast.