My local Italian email list has informed me that RAI radio has podcasts available via iTunes. I haven't actually tested this set of directions yet, but here's what the email I got said:
On iTunes Podcast directory you can browse to "International" then to "Italian." The podcast from RAI is under "Public Radio" then "RadioRai Podcast."
I'm going to give it a shot this weekend; if I run into any problems, I'll let y'all know.