I have a new 2012 Honda Accord that does not have XM Radio
Can I use my Droid X to listen to XM when travel?
https://market.android.com/details?id=com.sirius
It was an easy search of the market.
Yes, I believe that Sirius does have an apps. Just go to market and type Sirius into the search box.
Yes, they have an app, but the last time I used it I was not happy with it. Your mileage may vary. If they have updated the app they may have fixed the problem. You can download at the SiriusXM web site and you have to add that feature to your SiriusXM account. http://www.siriusxm.com/android The app is free and you can get a free account with SiriusXM but the listening is limited. Good Luck hope you like it.