Marcus,
I must say I am very pleased with the implementation of multiple playlists, and am awestruck when I consider the amount of time and energy you've put in to get things working properly.
That being said, I'd like to make a minor request:
Right now, the [N] key brings up the "Switch to which playlist?" dialog (when the playlist is visible). It would be nice if the [N] key could just cycle through the existing playlists, without any prompts. I usually have just 2-3 playlists, so the dialog is an extra step. Maybe this could be a menu option?
Not a high priority, but I often find myself switching between playlists to see if new episodes have arrived.