Here's a contribution for those searching for an answer to playing iTunes on Linux.
I found this solution and it works great.
Go here for a quick start. http://abwrites.wordpress.com/2010/06/20/getting-itunes-podcasts-on-linux/
It sends you to Feed Flipper:http://picklemonkey.net/flipper/convert.php
Feed Flipper is a free alternative to iTunes which converts an audio iTunes podcast into an RSS XML feed. The resulting URL (the Feed Flipper URL + your iTunes podcast URL) is then available to be subscribed to directly into your RSS feed reader of choice for ongoing podcast delivery.
Use "gPodder" for your subscription feed.
My first feed had an alternate link available where downloads were already converted.
Use "Clementine" player to listen to audio feeds. gPodder will load up straight into Clementine. Smooth...
I haven't run video yet. May need to chose your favorite viewer for this.
Hope this helps someone.