The popularity of yoga for persons with disabilities and other chronic illnesses is growing. Researchers at the Toronto Rehabilitation Institute and York University (Toronto, Ontario) have done some preliminary work evaluating the feasiblity and efficacy of Yoga in persons with spinal cord injury (SCI) [study abstract], which has led to a recently completed clinical trial [trial description].
The Spinal Cord Injury Zone has compiled a list of videos on yoga for wheelchair users. The videos can be viewed here.