I was told when it does become available, it will cost a few hundred dollars more to have it--I can't remember exactly how much. I'm hoping that it can be added later, but don't know. Also, it will be free for the first year, just like the regular Sirius, but then after that, you'd pay an extra $7 month in addition to your regular Sirius substription, for a total of $20/mo for both.