It would be great to see support from here like the Beccy Cole song, and I'd personally luv to see Sarah Mclaughlin, or Natalie MacMasters do it, but how about if considering approaching a singer for this type of thing, consider those who've already taken the initiative on their own?
I found some examples by googleing the question.
http://www.pmfrc.org/deployment/story10-29.htm
Just a thought.
Bruce