Well the two biggest things are his eating. He won't really eat anything. His diet is pretty much: nutrigrain bars, some cereal, grilled cheese, hot dogs, cheese on peanut butter crackers, chips, rarely will he eat pizza, and a few other things.
The next biggest thing is his speech. He has a VERY VERY limited vocabulary. And if you haven''t been around him long, you won't understand what he's saying. He has issues with certain letters and words. Like.. Blues Clues.. is Boos cues. His attention span is like 10 seconds long.. if that. more like 5 seconds. He's constantly switching the channel on the TV and he'll get pissed off and start going nuts if you change the channel when you want. There is NO reasoning with him. He starts up and it's hard to bring him back down.
He IS getting much better though. He's come a long way since he was 3-4 years old. School is doing wonders for him.
Here's a website that a parent from Oakstone created with some good links.
http://medicine.osu.edu/lend/resources/reslinks.htm