Make sure you submit your new podcasts quickly, because iTunes will temporarily close the iTunes submissions for a Christmas break, December 21–28, 2012.
Dear Podcast Provider,
iTunes podcast submission system will be offline from approximately December 21, 2012 through December 27, 2012 (Pacific). During this time, you will be unable to submit new podcasts to the iTunes Store. New episodes may appear in existing podcasts in iTunes Store slower than usual due to increased seasonal system load. Full functionality to the iTunes podcast submission system will be restored on or about December 28, 2012.
As always, you can continue to manage & edit podcasts that are already on the iTunes Store through their associated RSS feeds.
The iTunes Podcast & Radio Team
Do not panic that over “New episodes may appear in existing podcasts in iTunes Store slower than usual,” because this is referring to only how your podcast and its episodes display in the iTunes podcast directory.
Anyone who is already subscribed or subscribes during this time will still receive your latest episode(s). When someone subscribes with iTunes or almost any other podcatcher, they subscribe directly to your RSS feed and will receive any updates that it pushes out, according to their own update frequency settings (usually daily).
If you planned to submit a new podcast to iTunes, do it before December 21, or else wait until after December 28.