As I type this I'm listening to some cool Jazz that I've either downloaded or ripped from CDs. A lot of it is from "unknown" or unsigned artists. Some is from unheard of artists, such as Yoko Kanno (she did the soundtrack music from the "Cowboy Bebop" animated series and movie).
The thing is, why aren't radio stations playing this stuff? Some of my music is from the turn of the 20th Century (yes, it's on composition or bakelite, or whatever they used way back then), and continues up to the present. This is great stuff! It's not being heard, and that's a shame.