In the news:
Beyond Limits (8MB, requires QuickTime, from http://www.beyondlimits.tv/ )
CNN Excerpts (3MB, requires QuickTime)
Disabled students use their heads to make music (Associated Press)
With a Blink or A Tap, the Disabled Perform in Concert (NY Times)
The Headbangers Site
Our Free Programs for Macs
(Many of these programs are pre-OSX but you may still find them useful)