The paper that started it all.  As of June 2007, searching Google for the term "Googlearchy" found 53,300 online documents.  Saved somewhere I have a screenshot from February 2003, showing that searching for Googlearchy returned no results. 

For a .pdf file of the original article, click here. The full citation follows:

Hindman, Matthew, Kostas Tsioutsiouliklis, and Judy A. Johnson.  2003. "Googlearchy: How a Few Heavily Linked Sites Dominate Politics Online."  Paper presented at the annual meeting of the Midwest Political Science Association.