http://www.google.com/technology/pigeonrank.html
this is old, but I just found it
I love this part:
Isn't it cruel to keep pigeons penned up in tiny data coops?Google exceeds all international standards for the ethical treatment of its pigeon personnel. Not only are they given free range of the coop and its window ledges, special break rooms have been set up for their convenience. These rooms are stocked with an assortment of delectable seeds and grains and feature the finest in European statuary for roosting.