This was the last part I thought was interesting:
"Slacker provides about a hundred pre-programmed station options in addition to 10,000 artist-specific channels. Like the browser-based application, the BlackBerry app will let users program their own customized mixes. If you want to pay an optional $10 a month fee for the premium service, you get what might be the most appealing option: The ability to download songs and store them on your BlackBerry, letting you listen even when you're in a no-coverage zone."
So if you get to download it to your BB, will it let you move it to your computer? I use Amazon to download music (legally) and I can transfer those songs anywhere. Just wondering if you pay that $10 if you can transfer those songs. If so, that's a good deal if you download a lot of songs every month.