There is a radio programme featuring Karen King on The Connection which is based in Boston:
Mary Magdalene Reconsidered
That takes you to the web page; click on "Listen to show" towards the bottom. It features both Karen King and Lesa Bellevie, the webmaster of a site on Mary Magdalene. It is 50 minutes long so a bit more depth than is usual in such programmes; there's a phone-in too. I've not listened to it all, but so far it is quite interesting.