Larry let me know that Stitcher was released earlier this month as a free streaming audio application for BlackBerry. You can choose to stream selected podcasts, radio shows, and news to your BlackBerry on demand. This includes some cool feature partners like the Wall Street Journal. Not sure how limited the selection is and if you can add your own streams but Fox News and MSNBC is pretty nice.
Sadly it looks like this is now only available for the 8300 Curve Series devices and the Bold officially but Storm support is coming soon
It is definitely worth checking out at www.stitcher.com and it looks like you can pick it up OTA at the same link. Let me know what you think!