iTunes Radio on ATV1

Now that last.fm has shut down its subscription radio service, and that iTunes Radio seems to have come of age......

How about an update to enable iTunes radio on the ATV1?   Or is this technically impossible?

 

Is there any other streaming radio service accessible from the ATV1?..... Internet / Radio no longer seems to work (and I don't have ATVFiles(beta) installed)

 

thanks

jw