Rocky,
The same hardware that streams your iTunes to your system will also stream internet radio (and probably internet based Sirius/XM). Just give it a try. Find an internet radio station and stream away. Also, there are hundreds and maybe thousands of internet radio stations on iTunes. Just click on the Radio beacon under library on the left side menu on iTunes.
Enjoy,
TIC
The same hardware that streams your iTunes to your system will also stream internet radio (and probably internet based Sirius/XM). Just give it a try. Find an internet radio station and stream away. Also, there are hundreds and maybe thousands of internet radio stations on iTunes. Just click on the Radio beacon under library on the left side menu on iTunes.
Enjoy,
TIC