Heh. I have a number of Pandora "stations" -- a Ryan Bingham station that gives me a lot of Steve Earle, Lucero and Cross Canadian Ragweed (as well as Bingham); a station seeded with a Dave Mason song that gives me a lot of 60s vocal groups; an early-Genesis station that gives me a lot of Yes, King Crimson, etc.
Tonight I created a Tom Waits station -- and found that the thing about Waits is, "similar arrangements" can lead anywhere. So far it's yielded tracks from Guy Davis, Leonard Cohen, Ramblin' Jack Elliott, Lightnin' Hopkins, Morphine, Blind Snooks Eaglin, and John Lee Hooker. I'm expecting some cabaret to show up.