My Favorites:
Graeftenhof Maine Coons  http://www.graeftenhof.de
SSL Maine Coons                 http://www.mainecoons.de

Moonrakers Maine Coons   http://www.moonrakers.at

Peppermountz:       http://home.t-online.de/home/muh_peper/index.htm

The Cats Meow http://home.wanadoo.nl/mainecoonmeow/