Just read this in the HuffPo if anybody wants to try it out:
The University of Iowa Tippie MBA announced a $37,000 scholarship you can win by answering the question "What makes you an exceptional Tippie MBA candidate and full-time MBA hire? Creativity encouraged!" in a tweet.
Not sure if you have to tweet @TippieMBAIowa or some hashtag - but 140 characters would be tight in any circumstances, I'd imagine.