Interesting thread. I'm glad there are teachers out there like you, figmentmom, who understand some of the difficulties kids with Asperger's Syndrome face. My eldest son has Asperger's, and his first and second grade teachers both made it a point to attend seminars and learn what they could about his condition (his kindergarten teacher? more-or-less viewed him as a burden on the class, and I view it now as a "lost year" in social development).
Luckily for us, WDW is a great place for him. Since he's not really socializing with other kids, no one notices his conversational "quirks". The one concession we have to make is to be aware of time and long lines (not to the extent that you have to, disneyfanmom), but we need to watch it. He simply does not have the patience to wait much and will get very restless in line. So, we keep moving.
We've never explored getting special passes, because I meticulously plan our itineraries, and my son is extremely high-functioning. That's just our situation - I can easily see how other people with kids in the Autism Spectrum would need the passes. You have a kid with a condition like this, and you get to know a lot of other parents in a similar situation. We feel fortunate in that we don't face quite as many hurdles as some others.