There isn't really that much. The only one that puts out content on a regular basis is the Italian Serie A Football Fancast, the few episodes I listened to were pretty good. I couldn't stand Pink Shirt Wise Guys - they spend way too much time talking about what they are drinking rather than anything calcio-related. The Footy Show on The Score in Canada as of last year had Paolo Bandini on every week to talk Italian footy, but since The Score lost Serie A rights in Canada for the next 3 seasons, I don't know if that will continue. Beyond the Pitch regularly does Serie A related podcasts with Adam Digby, Roberto Gotta, Matteo Bonetti and Gab Marcotti. Beyond the Pitch is fantastic for everything, so you should just get that if you don't subscribe already.
To echo the previous post: http://feeds.footballfancast.com/ffc-Italia-Serie-A I listen to it from time to time and it has been good. And Beyond the Pitch when Marcotti is on is really good. I wish they would have James Horncastle on more often since he is great for Ligue 1 and Serie A.