Yes, I'd listen, as long as they were provided free of charge for NAFSA members (at least). I’ve been disappointment with NAFSA offering webinars for a fee for members, so I would hope that a podcast would be free.
Ideal topics would be anything timely. Also, occasional Q&A with governmental officials might be useful.
I would think once a month would be great but no more than twice a month. While I understand the importance of a “regular” time (e.g. weekly), I’m not sure I would tune in every week. Then again, podcasts are set up to be listened to later, too, so a weekly thing might be really useful as long as there’s a brief written synopsis to determine whether or not a listener wants to take the time to listen to the recording.
Those are my two cents!