The judges' prize goes to Michael Pershan's What if Khan Academy was Made in Japan?, followed by Kate Nowak's critique of Khan Academy's lecture on the coordinate plane, and then to Susan Jones' faithful homage to MST3K's talking robots. Dr. Tae's sharp critique of Khan Academy's enthusiasm for gamification won the People's Choice Award.
Each one is worth your while but special merits, again, to Pershan's video which is optimistic, constructive, and exhaustively researched. He edits himself extremely well throughout the video, maintaining this unflagging narration that's almost Ze Frankian. 13 minutes pass by in an instant. You should watch it, then subscribe to his blog, then follow him on Twitter, then visit him at his home.
Co-sponsor Justin Reich has his announcement over at Ed Tech Researcher. I echo his summary judgment:
Of course, the real winners of the competition are everyone who looked critically at Khan Academy (and looked critically at its critics) and developed a more nuanced view. If after reading some of the conversation generated about Khan Academy this summer, you have a stronger position that Khan Academy is [completely awesome/situationally useful/seriously problematic] then I'm pleased to have played a tiny role in nudging the conversation.