Links with helpful information:
http://www.wrightslaw.com/info/harassment.index.htm
http://www.ncset.org/publications/viewdesc.asp?id=1332
http://www.pacer.org – website with lots of info for parents of children with disabilities. Also has a lot of info on bullying.
http://www.bullyingnoway.com.au/issues/disability.shtml – Website based in Australia with lots of helpful info and support