FlyTunes will provide radio stations for iphone and ipod touch. Radio should work with Wi-Fi and 3G phones.
I found this information at work on TechCrunch-(FlyTunes to Bring Internet Radio to Your iPhone) and LiveCrunch
Well once I get home I will go little bit more deep into this radio feature and give you some more updates.
Don't forget this service will be activated on January 21st so you have to wait 2 more weeks :(
FlyTunes Says: There will be no additional hardware or Jailbraking required on your Ipod Touch (iPhone).