I know this is a shot in the dark and should try and contact you personally(but don't know how to do it) but I read the ABA thread and saw you are both from my neighbourhood(myself-nunhead/peckham rye) and as I am finding it increasingly difficult to meet people in similar situation(due to work/friends moving away/unable to make support groups/etc,etc)I was wondering whether I could possibly maybe gatecrash one of your meet-ups.
My son is 4 this month and would love some little playmates locally.
Don't know if you are aware but Peckham Rye Adventure Playground is open every Saturday from 9.30-12.30 specifically for families with autism.There hasn't been much support recently and this service will stop at Easter if there is not the demand so spread the word if you know of other families in the area!