As I've been using this podcast to be the background while playing Saints Row IV, figure I may as well recommend it here since theres people here who like MST3k/Rifftrax.
How Did This Get Made -
http://www.earwolf.com/show/how-did-this-get-made/Explore the world of crappy movies, a good panel discussions on stupid and some not quite as stupid movies. They do a show on Birdemic and talk to the girl who played Natalie, Greg Sestero ("the other guy from The Room") talks about The Room, Vanilla Ice talks to them about Cool as Ice, Patton Oswalt even stops by with the director of Punisher: Warzone.
That said, its not an interview show, most of their guests have nothing to do with the movies and they just talk shit about them, try to get to the bottom of plot holes, gush about the insanity of them, etc. The hosts IMO have really good chemistry, and it really comes through that they love crappy movies.
They've watched Over the Top, Street Fighter, Leprechaun in the The Hood, Old Dogs, etc. Really good for fans of crappy movies.
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edit - weird, kinda thought I heard about that on here (memory is shit), and searched the forums, but didn't look at the shout outs on the podcast until after I posted and thought about it, oh well. In my defense, I at least heard about it before it was on RPPR, lol. Also, just saw that episode was only partially listened to in iTunes, don't think I even got around to shout outs, was paused in the middle of Toms letter.