It hasn't been Thursday too long, but as promised, Sirius XM's iPhone / iPod touch app has popped up in the iTunes app store, ready for your aural digestion. There's a 7-day free trial being offered, but yeah, eventually you're gonna have to pay. Now that it's there, we might as well point out the app's got a 9+ rating for mild profanity and crude humor. Worth giving up Pandora, Last.fm, or any number of other free music streamers already available? That's your call, so go download and decide for yourself.