Anyone with any experience with Asperger's Syndrome ?

Background:

We have had a young girl living with us most weekends for the last few years. She is a friend of our foster daughter. So when she ran into family problems we became official support (don't know if this is the correct english term) family for her. She is 19 years old now and have had a lot of trouble staying in school. She seems to get sidetracked/distracted all the time causing her to miss classes/appointments and generally forgetting what she was supposed to be doing. She also have problems interacting with people she doesn't know very well.

She is actually very intelligent and writes her own music and poetry and her teachers says she is very gifted when it comes to math. But we had long felt that there was something more than just distraction going on, and finally got the juvenile services to get her some help. Well the result came back today. She has Asperger's Syndrome and the doctor said that the diagnoses were very clear and was wondering why it hadn't been caught earlier. Well I know next to nothing about this except that it is somehow related to autism, but thats about it.

Anyone have any experience with children /young people with this handicap ?