I strongly recommend that anyone interested in a rebuttal to Dr. Paul Offit's "False Prophets" and those who follow him in the autism blogosphere should check out "Autism's False Proffit" at Absolutely Unherdof.
The biggest issue AU has with Dr. Offit:
"is the lack of reference to real evidence but rather an attack on anyone that wants to try to help their autistic child try to recover from this neurological state."
Autism's False Proffit is a well written, informative, pull no puches, commentary both about Offit's book and the ways in which parents seeking to help their autistic children are dismissed by the pretentious pseudo-scientists who populate certain blogs. A good read for anyone with an open mind on issues relating to causation of autism.