The time is right for this idea.... there are now enough songs on the showcase to play nonstop for quite a long time without ever repeating a song! And if anything, the showcase posts are increasing so fast that even new songs get buried in the avalanche of newer songs.
With the paradigm of a radio station, songs from the past would continually bubble back to the surface, and the shelf life of everybody's songs would improve.
If it was set up to allow the listener to pick a genre or an artist or other criterion for selecting the play list, that would put it in a league with the other big music streaming sites. You might even be able to sell advertising to help pay for the bandwidth!
And with a little promotion on our facebook pages I can easily see the radio station becoming something that people all over the world might start listening to. That kind of exposure could drive people to your sites to buy your music, as well as driving new customers to PGMusic's site.