We had heard before that SIRIUS XM was launching their dedicated app for BlackBerry sometime near the end of January. While that time came and past we still had no app from them available. Seems like we just had to wait a little bit longer, the observant folks in the forums have let us know the application is now available.
Devices supported, as indicated on the site are Curve 8500, Bold, Storm and Tour. With the application you do get a free 7 day trial and after that it's required that you sign up for one of the subscription options that are available. 120 channel, no ads - but sadly it appears no Howard Stern either. Check it out, let us know in the comments what you think of it.