We use the excellent
DirCaster PHP script which generates:
<item>
<title>podcast.MP3</title>
<link>
biblestudy.com/podcast.MP3
</link>
<author>
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(BibleStudy Office)</author>
<description>rpodcast.MP3 -</description>
<pubDate>Mon, 07 Nov 2011 12:15:07 +0000</pubDate>
<enclosure url="
biblestudy.com/podcast.MP3" length="34119262" type="audio/mpeg"/>
<itunes:author/>
<itunes:summary/>
<itunes:subtitle/>
<itunes:keywords>
Podcast, audio, sermons
</itunes:keywords>
<itunes:duration>00:47:23</itunes:duration>
<guid isPermaLink="false">
biblestudy.com/podcast/dircaster.php/podcast.MP3#1320668107
</guid>
</item>
So from that you have the title, author, published date (this is based on the date associated with the file, so if it's uploaded on the day fine, else I use Filezilla and tick keep the date) and obviously the link to the file.
iTunes also displays "extra detail" we enter, such as the bible verses, though that doesn't look to appear in the XML code.
Thanks for the swift reply, with this system we can currently create an RSS feed from the product (MP3) and could use that on the website, but Biblestudy has so many extra features it would be good to have that automatically up to date too.