My previous Doctoral cohort leader/superviser was Len Sweet when I was studying at George Fox UNiversity. Well there is a new podcast to listen too called 'Napkin Scribbles' from Len. They are billed as "Thoughtful sketches of God and life from thinker and author, Leonard Sweet."
I only listen to a few podcasts but these will be regular items for me along with BBC4's In our Time. Each podcast is short and excuse the pun 'sweet'.