Welcome to the NeuroTalk Support Groups.
I'm sorry your questions went unanswered but the Children's Health Forum is a little slow sometimes.
You've probably already seen their site, but there is a very good organization in the UK...
The National Autistic Society - UK
There is an Autism Forum
here at NT and there will be more Autism specific topics there to check out. Useful Sites - Aut NT
You may also find some useful information regarding your questions at the Autism Speaks site and the Latitudes site.
Autism Speaks - CAM
All the best to you and your son.