Dave Walker point us to the new iTunes RSS extensions. By the way, this is very frustrating, both Microsoft and Apple have released their extension this week (and Yahoo! previously). None provide new functionality, rather they just replace existing functionality that we already had in other RSS elements and extensions, but of course, everybody wants their name on a spec (a.k.a. vendor lock-in). The worst extension here is the <itunes:category>. This should have been <category domain='iTunes'>Techology/News</category>.
http://phobos.apple.com/static/podcast_specifications.pdf
Winer's thoughts (his Websites are currently down)
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