These sites, with information on cognitive and developmental disabilities, are presented as a service to visitors to the Special Olympics Web site. The sites (listed in alphabetical order by title) below are not owned or managed by Special Olympics.
Not Special Olympics - specific, but a general disability - related site that people might be interested in checking out is the website I'm actually an employee at, Disaboom
It's a fairly new (less than a year old) online community for people with disabilities.
I also like the BBC's website, OUCH! (news, blogs, discussions, etc.) and the Paralympics website is pretty cool too.