I read "The Continuous Integration Build Game" 6 months ago, just when I had found Hudson. The idea behind the game seemed so simple and at that time we had problems with people comitting code that broke the build and failed the (very few) unit tests. I thought that the game could help out, as people like competitions and they would try to "win" the game. To win the game the developers have to commit code that is compiling and add unit tests.