I found this online today. It is a HUGE online research study looking at ADULTS with autism, asperger's, ASD, etc. You register, take the entry survey, and then as research surveys come up that you would be eligible for they will add them to your list and email you. Each survey is completely optional and it looks like they are doing a good job with confidentiality. I'm not familiar with this university, but I definitely believe we need more research looking at adults on the autism spectrum. If you are an adult with any ASD diagnosis it only took me about 20 minutes to get this started.
http://www.thegatewayproject.org/