I read most of the speed camera sites and contribute fairly regularly now and then. For UK readers here is the essential list:

http://pepipoo.com/NewForums2/ - legal and technical discussions - several high court appeals in motion, populated by probably the best non-legal speed experts in the UK.

http://www.cumbriasafetycameras.co.uk/forum - Forum run by CSCP, marvel at all the ignored questions, like "how many collisions are caused by vehicles exceeding the speed limit" and "what control sites are used to compare statistics"

http://www.pistonheads.com/gassing/forum.asp?f=10&h=0 - Pistonheads - Speeding, Plod & The Law forum

http://www.safespeed.org.uk/forum/ - Safe Speed - forum run by Paul Smith, the man Brunstrom tried to gag (Chief of N.Wales police).

Gareth (no points TOUCH WOOD!)