Autism Speaks  has put together a Transition Tool Kit targeting families with special needs children ages 14-22. The goal is to support transition into the community when school services end.
The kit is downloadable, but as best I can tell the kit is the same set of PDFs that are found on the above page. An "online appendix" is a curated set of links to additional information.
The kit is pretty generic, because state rules vary . Autism speaks has state resource guides (ex: MN) with sections on adult transition. Minnesota's data is a well done list, and it includes a state specific transition guide.
I'm including all of MN specific information in my MSP special needs custom search engine.
 In the past they've been associated with the immunization obsessed, but I wonder if they're trying to get clear of that crowd.
 At some point, do we relocate to a state with better services? What happens when millions of retired adults begin driving their mobile homes around the nation, desperately seeking dwindling services for their adult children? Just wondering.