Supposedly SiriusXM submitted an app and it is just awaiting approval. Don't know when it's coming but this would help you out and hopefully be cheaper than $9.99 like pocket tunes radio. It should be called uSirius when approved: http://www.crunchgear.com/2009/02/02...-waiting-game/
I listen to Stern through the Wunderadio app. Works fine except for the fact that you have to log into the sirius account EVERY time you open the app. Good stream nonetheless.
This is your best bet. I've used this with the old uSirius App from Millard Software (which I cant find anymore) but apparently the Replay A/V program will stream from the sirius site by itself.