National Association for Down Syndrome Resources Page. This page includes facts about DS, resources for special educators and parents, and provides links for websites, DVDs, organizations, medica lresources, etc.
Riverbend Down Syndrome Association- not sure where to put this- this is a website with TONS of information and studies (not just the abstract) related to DS. From dolphin therapy to life planning for adults, a wonderful resource.
Community Resources: Down Syndrome Association of Greater Cincinnati is a wonderful resource for all parents of students with Down Syndrome. They have multiple events happening throughout the city for students and their families (even friends) to be involved in.