Massage & Bodywork Magazine has had some nice articles. Here's a link to a recent one on the Anat Baniel Method (ABM) of bodywork for children with special needs:
http://www.massageandbodywork.com/Articles/DecJan2007/possibilities.html
Here's an article on Cranio-Sacral Therapy with Dolphins & children with Special Needs:
http://www.massageandbodywork.com/Articles/OctNov2005/Dolphin.html
Here's an article on treatments for Cerebral Palsy:
http://www.massageandbodywork.com/Articles/DecJan2003/RightCombination.htm
Here's a link to an article on Massage Today about massage for people with Autism:
http://www.massagetoday.com/archives/2005/02/04.html
Then, if you check out Touch Research Institute's websites, you'll see summaries of research studies. There are 3 listed for Autism, one for CP, one for Cystic Fibrosis, one for Down Syndrome, and lots for Preemies:
http://www6.miami.edu/touch-research/research.htm
Hope that Helps!