If you use Chrome (at least in the Mac version) or anything else that the direct iTunes link in the shortcut menu fails to deal with, you are going to have to subscribe manually by copying and pasting the RSS feed address into iTunes manually. The address to copy is:
http://homepage.mac.com/thomasjames/jimmerishfm/feeds/jimmerishfm.xml
- Then, in iTunes go to the Advanced Menu --> Subscribe to Podcast...
- Then paste the RSS feed url into the box that pops up.
- Click Ok
- Done.
Perhaps I'll make a video of how to do it manually later but I want to reward the more awesome people with Safari and Firefox.