Infoby,
Have you looked at the singers forums that exist now like:
http://www.singers.com.ar/forum.htm
There are many more, but this linked site has singers demo's on the site for people to listen to.
I used Google, with the search words 'singers forum' and hit pages of nothing but singers looking to be discovered, it also listed karaoke venues for workshops. I believe if I was a talent agent looking for a future star, I would first look at a singers forum, instead of a software support forum.
But that's only my opinion.
Jim