C-ApiSRO, works great.
http://forum.ppcgeeks.com/showthread...ghlight=sirius
and with the future of streaming and Sirius up in the air, I would go with the free software.
However Star Media Player is great and you don't have to put those crazy letters.
http://forums.geekstoolbox.com/showthread.php?p=14351
If I still have streaming in April I will pay the $10, just so I don't have to enter those crazy letters.