Here are some references of Panoramic Photo sites :

Guide for panoramic photo - Forum : http://www.panoguide.com/forums/galleries/

Photo Panoramique - French Forum : http://www.panophoto.org/forums/index.php

Photo Panoramic - English Forum : http://www.360rage.com/panorama-forum/

OpenPhotography Forum : http://www.openphotographyforums.com/