And I agree with what FSF just said below.
You guys know I like to do tons of film homework and I've never run across any information from the completed film side stating their source material originated with a contest winner and I've only heard a few references to contest winners being picked up for production.
Of the thousand-pluss produced indie films submitted to Sundance only a hundred-and-change get picked for show.
Of those hundred-and-change only 40% get picked up for distribution.
"Bass Ackwards was named an official selection in the 2010 Sundance Film Festival for inclusion in NEXT, a new category that recognized films for their innovative and original work in low-and-no-budget filmmaking and is part of a wave of films that showcases the diversity of independent cinema." - and still received no distribution.
Winning a screenplay competition... ? A synopsis competition... ?
The attention is nice, but... from my observations you're better off filming it yourself to get attention to your NEXT few screenplays.