I like to make music. Though I am no expert at it, I could take a try to get some of my songs on your "tremradio" thing.
But let me tell you why this would be a bad idea. I have done many things while listening to my Ipod. I sucked more in the sports I played, got tired faster, and lacked in focus, all when I did something while listening to music.
Tremulous, I had done much worse at it while listening to music, partly because of the reason that I could not hear my enemy, and was not focused enough to aim that well.
Your ideas are swell and seem nice, but may not always work out.
I know others have their own opinions, and by stating mine, I am risking getting bagged by like 50 people who will flame me somehow. Just an opinion. After I finish my next CD, I will try out music for trem.