I've actually been meaning to find some information on this.
So as you know, I drive a 09 Touring model, and I'm not much to listen to the music while I drive; rather with windows open and listening to the roar of the V6, but enough of that engine sound beauty nonsense, I finally sat down in the car and recognized the "sat" button. So I hit it and bam, what do you know? I get XM radio.
I just wanted to get more information on it, like how long the satellite radio will last (since I know XM or Sirius are subscription based), how much it costs (or whatever), and whether or not it really matters. I listen to my own music, so I have CDs in the car and I'll probably get an AUX IN cable to listen to my MP3 player.