www.accessibility.com.au is a guide to accessible venues in Australian capitol cities, including restaurants, shopping centres, pubs, accommodation and tourist attractions. Check out the Sydney guide.
The City of Sydney website has information about accessibility in the Sydney CBD, including accessible parking spaces and access maps.
YConnection is a site created by and for young people with disabilities. The site includes chat and message boards, as well as info on activities and health/life issues.
The Multicultural Disability Advocacy Association of NSW (MDAA) is the peak body for people from a non-English speaking background (NESB) with disability and their families and carers in NSW.