I cannot recommend the http://www.frcd.org/ highly enough; their (free of charge) spec ed seminar is invaluable. I have a five-year-old daughter on the autistic spectrum. She was in EI at 2 1/2 and entered the Chicago Public Schools at age three. Currently, she is in an amazing program at an outstanding school. I know our family is lucky, but I also believe it has something to do with educating myself about her rights.
Bottom line: if your child has special needs, he is entitled to a fair and equal education to that of his typically-developing peers. "CPS doesn't have the money" is not an excuse. It doesn't matter what other families aren't getting. Don't let the CPS balance their budget on the back of your kid. Who knows - perhaps you'll actually get to work with CPS staff who care about your child:^)
Good luck!