One user helpfully emailed me concerning problems with the Car Talk Library item. It indeed does not work. You can download (and the Import into Streamers) a data file from "http://homepage.mac.com/christianturner/Streamers25.data that contains a working Car Talk item, as well as some French radio items with which I have been helping another user. The Car Talk item now opens the stream through the browser first, rather than directly in RealOne Player - which is for several reasons less desirable.
By the way, I'd love for people to post or to send to me their Libraries - I'll post them for others to download and Import. Just post or send the Streamers25.data file located in your ~/Library/Preferences directory.