Sirius XM has finally released its app to subscribers that allows 120 channels. Many favorites will be available such as The Grateful Dead Channel, Eminem’s Shade 45 and Radio Margaritaville, while others like Howard Stern, MLB Play-by-Play and NFL Play-by-Play will not. A 7-day trial is available, but then a subscription is needed as well as iPhone OS 2.0 or later firmware. Current customers can use the app if their package includes online access. You can download the Sirius XM app now.