One of the ways you can get people to download your not so known content is to post a link in a forum with a message and curious people might try your file.
Making this a user option is good (empowering the user) because you never know what people will do with this, and it makes Gnutella look better because it's not just for pirating music.
Gnutella developers should always provide features to publishers of original content since it ****** off the RIAA that they can't get $$ for it.