Social Security Online - Social Security Disability Insurance.
Although this site may seem overwhelming, there is helpful information scattered throughout, and the content is always kept up to date.
University of Iowa - University of Iowa's
Healthcare site regarding Social Security Disability Insurance (SSID) that is not as dense as the Social Security site.
Overview & FAQ's about Disability Insurance - The Insurance Information Insitute's
page for all questions concerning Disability Insurance.
Everything Disability Insurance - MSN Money explains Disability Insurance
through a myriad of perspectives and aspects of every policy
Cornicopia of Disability Information (CODI) - The School of Public Health of the University of Buffalo
offers information and statistics on disability in American and even Canada.