Thanks. I haven't used Pandora for several years so I'm not totally familiar with how it functions. But I can imagine.
My iTunes library is quite substantial at around 24k songs so I was just curious whether Radio would be more worthwhile (by providing new songs) than just playing a Genius playlist which would delve into my already large collection.
No, unfortunately not. I'd love to have this too. Should be pretty easy to do at least for Match subscribers (since the songs have then already been uniquely identified).