On last week's Torah Talk radio show, Rabbi Yaakov Menken interviewed Rabbi Tzvi Rosen of Baltimore's Star-K Kosher Certification on a subject I've recently become interested in: kosher cheese (see here and here).
The audio stream is available at the site; the interview with Rabbi Rosen is about 43 minutes into the program. (The first half of the show, an interview with Artscroll's Rabbi Nosson Scherman, is also enlightening.)
My curious cheese curiosity has inspired me lately to start learning the laws of meat and milk. I've kept kosher all my life; it's about time I studied the rules!