Busymommie,
Just wanted to let you know that two of my students (self contained class for children with multiple disabilities) are in kindergarten and first grade for inclusion. The kindergartner stays for about half of the kindergarten day and from the way you describe Riley, she is definitely more "typical" than my student who is in a wheelchair and is non verbal. Kindergarten has been great for him, he is more involved and happier than he was last year when he only attended circle with kindergarten. He has a one to one aide with him who facilitates his interaction with the other children and adapts the tasks so that he can participate as well. All in all it has been a great experience. Inclusion is much easier and more effective in my opinion in the earlier grades when the children have more time time for socialization. Also they are much more able to accept differences in others and to learn from their teachers and other adults in the classroom.

Hope this helps a little,
Lisa