Apparently there is a group of Autistics meeting on Second Life calling themselves the Autistic Liberation Front. One woman who is so severely autistic that she can't speak without the aid of a keyboard spent months making sure her second life avatar had the same ticks she has. It's quite fascinating, and rather encouraging.

This all speaks to the very basic definition of what is a disability and what is a cultural difference. If you enjoyed this at all, you will probably enjoy watching http://www.videosift.com/video/An-Autistic-Woman-Speaks-Her-Language-Then-Ours.