This is harder than it used to be.
We have just added our class podcast to iTunes I though it might be worth noting the steps.
The RSS feed from Glow Blogs is not optimised for podcasts so I used Feedburner to create one. You need a google account to set up on Feedburner. Once you have done that you add your RSS feed from your blog to Feedburner and tick the podcast box.
An important setting is to have an image for the podcast art.
You need to upload a square image bigger than 1400 by 1400 pixels for iTunes. Remember to change the maximum size in Settings-> Media as by default Glow Blogs resizes image bigger than 1200 pixels. Then add the URL for that image to Feedburner.
You end up with a url for your podcast feed, ours is:
you then submit that at the apple iTunes Connect site. You need an Apple ID for that. It is pretty straightforward. You can check the feed and submit it.
Feedburner is showing its age and is missing some of the tags that Apple likes but it still works. Feedburner was taken over by google a while back and I hope it does not go the way of Google Reader. I don’t know of another free service like it?
My classes podcast is approaching episode 1 and we are having a deal of fun working on it.