Well, you can't please everybody, I guess. If you develop a rapport with a guest, conversations do tend to veer into other areas (check out my multiple interviews with Juliana Hatfield where we go off on tangents about old movies, the Spice Girls, reality TV etc. and I constantly say "I swear we're gonna get back to your new album").
I've heard from listeners who wren't even aware that the film existed who are now anxious to get it on DVD, so that's good enough for me.
