Sean Nelson of Harvey Danger fame is also author of the forthcoming book on Joni Mitchell's Court & Spark. On November 9th he sat down and talked with The Beat on KUOW in Seattle. You can find the link to the archive on this page.
I haven't had a chance to listen to it yet--my work computer doesn't like to cooperate with certain streaming audio--but it looks good. There's also a segment on Chinese rock (not the Johnny Thunders kind) on the same program.