I am using the Orb app in the market, but it is possible to use Mycast.orb.com to stream it also. I just find the app (even tho it is 10 bucks) to be easier to navigate. You have an online subscription right? If so, download SiriusXMStreamer (
SiriusXMStreamer - Sirius|XM Internet Radio Stream Proxy) Log in with your details. Go to the sirius channels tab and go to a channel you want to listen to. Right click it and choose copy>channel URL>default. Now log into mycast.orb.com.
Click "open applications" in the top left hand corner and choose Audio. Go to Internet Radio in the left hand frame and then choose favorite channels. In the top of the screen you click "custom". Then paste the channel URL in the pop up and the channel name. That is all there is to it. You can go back to SiriusXMStreamer and copy all of the channels you want and add a new custom radio channel for each one.
It does cut of every once in a while, but it doesnt really bother me since pretty much the only thing i stream is Howard100 and 101. I didnt have to change any settings at all within Orb to get it to play. You have to have SiriusXMStreamer running at all times though as a server as well as Orb on your computer. It transcodes it to .mp3.