For those of you who might have such an artwork ready to send. (At first, I thought they meant those "Artworks" made of string, but no):
"we are seeking artworks that contain any of the bowed stringed instruments. 12 winners will be published in the 2008 Celebrate the Strings! calendar. Any medium, no fees. Artwork must include one or more of the instruments from the bowed string family, ie. the violin, viola, cello or string bass....
for more info, see
http://www.theviolincase.com/art/index.htm#prospectus