So genius won't create a genius playlist for any song by The Beatles or AC/DC. Yet it will create smart playlists for plenty of songs that have never been in the iTunes store. For instance Sad Song, by Oasis has never been available in the iTunes store, but Genius creates a prefectly good genius playlist using it. I have even created fine playlists from bootlegs that obviously aren't on iTunes. But try to use Genius for Two of Us by The Beatles and you get an error message saying iTunes can't use genius for this song. The only other thing I can't get genius to work for are really rare bootlegs that probably only a couple hundred people have on iTunes. But its not like millions of people don't have the beatles on their iTunes.