I found it, RedTurquoise. As I read it, they lifted part of the media filter from an established tank, and put it into the new tank.
"My theory was that I could transplant some bacteria from the cycled 55 to the 30 long and that should cut the cycling time in half. Boy was I wrong, but wrong in a very good way! We bought a second Emperor 280 power filter for the 30 long so I could pirate the bio-wheel from the 55 to jump-start the cycle" (
http://aquarium.bluemoon.net/tammy/version2.html ).