I started listening to Pandora years ago when music storage device broke (can't remember what it was called but not I-pod) I had roughly 300 CDs on it. I used it when driving long distance from FL to Canada and other road trips which is what I generally use Pandora for the most.
I think that advertising targeting location specific services/products would be a good idea. For example I leave FL, driving to NC up I-95, Pandora is tied into Ways so you know my trip. You should make food, fuel, hotel/motel suggestions or maybe tourists stops. The only advertising I get is from business's near my home town. That is no help to me in Savana, GA, Walterboro, SC or Charlotte, NC.
