Although this site specializes in resources for families in California, the Autism Law site should be a starting point for a parent or legal professional beginning a case for a child with autism. It is comprehensive in its scope both on the law and related resources.
The PACER Center which is clearinghouse of information on topics related to all disabilities including autism, it has a great article on preventing the dangers of household chemicals related to the development of special needs, including autism.
One of the most awesome bloggers on all things special education and special needs is Terri Mauro. She publishes several different blogs which can be accessed from her "personal" blog Mamatude. How she has the time to raise two children with special needs and consistently publish quality blog material is beyond me. All of her blogs are worthwhile reading for their humor, humanity and resources.
A friend of mine publishes the blog Raising Romulus and Remus. Again, while her twin boys from Russia do not have autism, her predicaments, and the day to day tumult that Lydia describes with much fun and aplomb is worth the read, if for no other reason than it will help you get through to another day. Most parents of children with autism and other special needs will be able to relate to her daily trials.
Liz Ditz of the blog I Speak of Dreams has a wide ranging scope and always seems to zero in on the most crucial parts of important articles and arguments. She has one of the most comprehensive blogrolls I have ever seen, and is always worthwhile reading.
Peggy Lou Morgan writes with incredible pathos about her day to day work with her son, who has autism. She spares no details without becoming maudlin. A parent will never feel that they are the only ones going through things after spending time reading Peggy's accounts of the good and bad times raising a complex child.
A personal favorite of mine is Ryn Tales about the adventures of raising a 27 week preemie with CP. I have to admit that I immediately connected with her site because my son was also a 27 week preemie and has CP. She writes well and does not pull any punches when it comes to the concerns a parent has about the day to day of raising a child with physical challenges. She also brings out a lot of great resources in her postings.