Rheumatology organizations that are beneficial to patients.
American College of Rheumatology
Overall a great resource for patients and physicians.
Arthritis Foundation
One of the largest support groups for patients with arthritis.
Lupus Foundation of America
Lupus focused group. Patients will definitely want to check out the community section.
Spondylitis.org
There are not too many Ankylosing Spondylitis specific sites, but the above link is a worthwhile read.
Vasculitis Foundation
Vasculitis is a difficult disease. This is a link to a foundation that tries to help patients better understand their disease.