This is awesome! Berryscanner.com just released a free beta app for BlackBerry. So far it works great! The app is free during the beta but I am not sure if it will remain that way. It looks like the app is using free feeds from RadioReference provided by volunteers so not all areas are covered. It's very consistent and easy to use. A free scanner baby!
Here's the OTA download link BerryScanner: Listen to police and fire scanners on your BlackBerry