This reminds me of NetPositive, the web browser that comes with BeOS. All of it's error messages were haiku (haikus?). I've done some searching, and this is the best collection of them that i could find. When i first installed Be, i spent 40 minutes or so entering bad urls just to see the poetry.

BlueLines

Disclaimer: This post may contain inaccurate information, be habit forming, cause atomic warfare between peaceful countries, speed up male pattern baldness, interfere with your cable reception, exile you from certain third world countries, ruin your marriage, and generally spoil your day. No batteries included, no strings attached, your mileage may vary.