If you have the latest OS 4.5+ you can take advantage of this streaming radio service offered by SomaFM. Rafa1 let me know that they have 3GPP compatible streams of all 14 of their commercial free underground/alternative radio stations. I had a chance to listen to it myself and was quite pleased with the content and quality even though you wont find large bands on SomaFM.
One of the three links below should work in showing you the mobile streams:
Let me know what you think! You can read more at www.somafm.com