The Massey Lectures are an annual Canadian tradition: lectures on social interests broadcast on CBC Radio. I’m not sure how long they’re up, but as part of the “Special Delivery” series is a 1979 talk by Jane Jacobs on “Canadian Cities and Sovereignty Association” (34 minutes).
Download it while you can! (I already have). There’s also a 1965 lecture in the series by John Kenneth Galbraith that looks good.
After all of these years, it will be an interesting listen to hear how things have changed (or not).
Of more current interest, the first of four parts of the 2007 lecture by Alberto Manguel on “The City of Words” is currently available on the CBC podcasting site. There, they explicitly state that files are posted only for four weeks, so you’ll need to return over the next month or so to get the other three lectures.