Sirius XM has released its new Sirius XM Premium Online application for the iPhone and iPod touch. Premium Online allows Sirius and XM subscribers access to 120 online channels of programming, including music, sports, talk, news, entertainment, and comedy. The app also offers the ability to immediately purchase songs heard within the app from the iTunes Store, or tag them for later purchasing, the ability to save favorite channels, and the ability to see what others around you are listening to with a feature called LookAround. Notably, the app lacks Sirius XM’s immensely popular Howard Stern channels, which has angered early reviewers. Sirius XM Premium Online is avialable as a free download from the App Store; subscription required.