I have 2.1 working on my iPod Touch (1st gen) and whenever I hit the genius button on literally any track in 7gigs of music it just says "Try Again. This song does not have enough related songs to create a Genius Playlist." What gives? I have some pretty mainstream stuff on here. I am starting to wonder if iTunes has to process the genius data for your tracks before you sync them over (i.e. will not work with existing tracks on your iPod unless you delete them and resync)?