In case you missed it on Language Log:
Robert Siegel interviewed Bill Labov on All Things Considered, 2/16/2006: “American Accent Undergoing Great Vowel Shift“. Siegel is an intelligent and skillful interviewer, and Bill gives a terrific performance. Listen to it!
Yeah, do that.
P.S. Why do radio stories on language variation always have to play the “you say [tʰəmeɪɾoʊ], I say [tʰəmɑ:ɾoʊ]” song???