Would it be possible for IMDB to list the cast of a podcast?

Currently I am helping develop a 7-part audio play podcast, which has a fairly large cast of actors - I think it would be neat to give these volunteer actors an IMDB credit for their participation in this series, but I don't see any podcasts listed on here. I looked up "Serial" and found nothing (I figured if any would make the cut, it'd be them, because Serial is so popular). 
Is this something IMDB plans on expanding to include?