I just read a book Creative Therapy for Children With Autism, ADD, and Asperger by Janet Tubbs was very interesting. I am not sure what to make of it. On the one hand, it seems that she has much success with her complimentary therapies like music, art, massage and color, in addition to standard medical and speech therapies in breaking the shells of children with Autism and Aspergers syndromes. But on the other hand, she is not a licenced therapist, she had no one write a approbation for the book, and she did not use much research to back her techniques. I suppose her techniques were harmless and may be worth a try, though.
However, she did write that music lessons for children on the Autism Spectrum can be very beneficial.
Shifra