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

Autism Overview

All the best to you and your son.