I just discovered an amazing app for my Blackberry called IHeartRadio. It lets you choose from 350+ stations by format, city, call sign, or a random selector. Sounds great too. You can set favorites, tag songs, and download lyrics while you listen.

iheartradio.com 350+ Radio Stations, Videos & More

Free for BB and iPhone.

Blackberry natively multitasks. I love walking around with my device and listening to music while chatting on AIM, viewing a spreadsheet, or writing an email.