For those who have purchased iPhones, the new ringtones are now available at the iTunes music store. They don't have that many songs available to purchase as ringtones yet, and no Beach Boys songs as far as I can see, but there are a number of Brian Wilson songs, including most of BWPS, and Imagination.
Don't waste your money on a ringtone, just put an mp3 in the correct directory on your phone (any modern phone) and select it the normal way.
Ringtones are a rip-off.