I have a running playlist in iTunes that was destined to be a mix, consisting of odd cover songs that actually work (or don’t). I was all excited to work on it this weekend until I saw the 66 Alt-Rock Cover Songs list on the iTunes Store, which took all the wind out of my sails. Not only did it include some of the covers I was already planning to use for the next mix, it also included some I didn’t know about. “Do You Really Want to Hurt Me” by the Violent Femmes? “Everybody Hurts” by Dashboard Confessional? “Lithium” by the Polyphonic Spree? Oh, it hurts us, precious...