The OASIS (Online Asperger Syndrome Information and Support) @ MAAP Services is a terrific site for information and suggestions for teens and parents. It addresses many topics for families living on the autism spectrum.
The National Autistic Society in Great Britain has great site with loads of information. For information dedicated to teens, use the search function asking for teens with autism.
OAARSN (Ontario Adult Autism Research and Support Network) is a site which uses online communication tools to connect people. There are many first person stories, articles and other items of interest to adults, parents, caregivers, professionals available here.