Virginia Tech's T/TAC has a UDL wiki site!
Go VT T/TAC! Click on http://udl-vt-ttac.wikidot.com/ and click "Menu" to see their links to resources that support students with Autism and other disabilities within the Universal Design for Learning framework. The wiki (a read-write tool to which registered users can contribute) traces the UDL concept back to the foundations in architecture without losing the point-that UDL is an educational framework based on research about learning, not just a checklist of accessibility. Worth a look!