I was surprised to hear a couple of weeks ago when XM was airing an old American Top 40 episode from the mid-70s on its 70s channel, Kasey Kasem mention KOTN. It was in his regular segment mentioning that AT40 is heard around the world on "great radio stations like..." and one of the three or four affiliates he mentioned then was KOTN, Pine Bluff, Arkansas. Pretty cool to hear those call letters mentioned!
I think its great that XM is airing a lot of the syndicated elements on the decades channels. Chickenman, ATF, Wolfman Jack, to name a few.