Sage Days 30 Best First Contribution Prize
Chris Berg and Francis won the Best First Contribution Prize (http://www.amazon.com/Extreme-Programming-Explained-Embrace-Change/dp/0321278658 on http://en.wikipedia.org/wiki/Extreme_Programming + chocolates) for their implementation of K-schur functions in non commutative variables, and jeu de taquin for D-complete posets