Links to organizations in Hong Kong that help children with developmental disorders:

The Child Development Centre at Matilda
The Hong Kong Association of Speech Therapists
The Hong Kong Paediatric Society
The Rainbow Project
Watchdog Early Learning & Development Centre

Other useful links:

Autism Society of America
CPOL: Standing Liaison Committee of Speech & Language Therapists / Logopedists in the European Union
Eric Chen's website on autism
LD Online: Learning disabilities information site
University of California - Davis M.I.N.D Institute