Ok, got tired of song on demand not working anymore. Then, because of this reduction in functionality, my 12 yr old daughter started saying our Model S wasn't that cool anymore. (GASP!) Sooooo... I signed up for Slacker Premium. Now any song that can play on demand does. And I can create Play Lists on the Slacker website and play them anytime I like in my S. Also the playlist songs can be replayed/restarted with the back arrow. I'm very happy with it now! If you like Slacker in the S, I highly recomment upgrading to Premium. Just goto Settings -> Apps -> Media Apps and LogOut of your bundled account and Login to your new Premium Account!! I think you'll be glad you did!