I am a pediatric speech pathologist and have worked with children of all ages with PDD, autism spectrum disorders and numerous other speech and language delays. My advice as G8RFAN stated would be to try to get your child into an inclusive program, meaning that he would be educated with children who do not receive special services, to serve as role models for him. Social development is so important for these kids and typically developing role models are a great way to increase social skills. I have also found that Stanley Greenspan's book The Out of Sync Child is a great resource for parents as well as professionals. I wish you lots of luck with your child!