My 3 1/2 year old son has PDD NOS - Pervasive Developmental Disorder not otherwise specified. This is on the autistic spectrum. I noticed that he was not talking, making eye contact, doing repetitive things when he was 2. He does do some hand flapping when he is mad or excited about something. I started with the local AEA office. They came to my house and observed and evaluated him. They started working with him about once a week. He is very smart as well, he just cannot express everything in a manner that WE know what he is saying! They suggested that he be evaluated for autism (which I had a gut feeling about) and gave me suggestions on where to take him. We went to the University of Iowa to do this. I do know that there are places in Omaha that are great too. I would start with the AEA. They were so nice and easy to talk to.
Hope this helps! Good luck!