It costs about $3.50 a month for current subscribers, or $14.95 if you are
not a subscriber.
The player is flash so it isn't very accessible. Some people have gotten it
to work.
I don't mess around with the online player; I find it easier now to bring
stations up with the iPhone using the SiriusXm app. If you just want music
and not the sports channels, you can get the Music Dock app for the iPhone
and use your SiriusXm log-in info for that.