Slacker Radio for BlackBerry 3.1.76
the author of this app says:
Listen to all of your favorite personalized Slacker stations on your BlackBerry for free! You can listen to over 100 stations programmed by music experts or create your own custom stations right from your BlackBerry.
BlackBerry Device Software Version 4.3.0 or higher. OVA (Over the Air Install) must be done on BlackBerry phone.