Another of the agents whose blog I follow is Rachelle Gardner. She recently ran a contest: come up with the best answer to "How many agents does it take to screw in a light bulb?"
Only one. The problem is, the publisher asks her to change it again. And again. And again…
Though I didn't win, I made the "honorable mention" list.
I hear that 70% of Pulitzer Prize winners started this way.