APUG
Analogue photographers user group http://www.apug.org/forums/home.php
Clikpic
Websites for photographers and artists http://www.clikpic.com
FADU
Film and Darkroom users UK forum http://www.film-and-darkroom-user.org.uk/forum/index.php
Flickr
Picture sharing website http://www.flickr.com/
RPS
Royal Photographic Society http://www.rps.org/