For those of you who have subscribed to the podcast via iTunes and have been wondering why earlier episodes are either absent or disappear periodically, I recently submitted a new feed and hope that this will take care of the problem. The iTunes icon in the sidebar now links to the new iTunes podcast page. If you want to continue to receive new episodes through iTunes, or retain older ones, I suggest you re-subscribe there.
Unfortunately, I am still extremely limited in terms of my ability to choose what shows up in iTunes, such as podcast information and information for individual episodes. Apologies for this inconvenience.