Bruce Clay.com * United States Version (Bruce updates this chart regularly. Bruce's new .htm format is very sexy and yet extremely helpful. You can still access Bruce's search engine relationship chart using PDF and it too is still well worth opening and perfect for color printing. Thank you Bruce!)
http://www.bruceclay.com/searchenginerelationshipchart.htm
http://www.bruceclay.com/searchenginechart.pdf

Doug Heil's ihelpyou, Inc. (This interactive search engine chart was developed using Flash. Fabulous job, Doug! For those of you that would like to display this chart on your website, Doug will give you the code for free! Thanks again, Doug!)
http://www.ihelpyou.com/search-engine-chart.html