Sound Opinions - Listen Critically - I can't find now where I got a link to these guys, but Sound Opinions is a rock and roll *talk show* (sweet!) on Chigago Public Radio. It's excellent, geeky stuff, and it's a nice antidote to most music radio.

Particularly good (and this was the topic of the aforementioned lost link) was the show with producer Jon Brion, who demonstrates on piano a fascinating comparison between Nirvana's "Lithium" and Gershwin's "Someone To Watch Over Me".