Alberto Savoia published an humorous story about Unit testing. There is also a parchment version, in PDF (Parchment Document File :o).
I found it very enlighting and full of wisdom, a true pragmatic guide, inciting to write unit tests, and I created this to spread it around. Feel free to copy and print it.
It even made it to Wikipedia, well actually it's its author that composed the article, I bet it won't be deleted ... and I lost as it was deemed as spam.
Alberto asked me if he could have translated into french, the poster can be found here, and I'm also putting up a translation on the French wikipedia.
This really is ... the Ten Commandments of Unit Testing ...