Well, I'm a bit late to the party, but I can definitely understand the thoughts, concerns and feelings you're having. I applied in the 2008 cycle and was accepted late in 2007 to a couple of schools that really excited me. Then in January, with everything lined up and my plans all ready, I too suffered a spinal cord injury and am now tetraplegic. My injury level is C6-C7, however it is incomplete and I do have normal function in my hands, arms, and upper body. You're dealing with even more of a challenge than I, and I commend you tremendously for it. I will be attending medical school, however I have deferred at my chosen institution so that I can focus on rehab over the next year.
As far as schools go, I know Mount Sinai is very friendly to students with disabilities. That's where I went for inpatient rehab, and my attending was a member of the adcom. They recently graduated a tetraplegic who went into radiology, and the student was not the first at all to be graduated by Sinai in a wheelchair. Interestingly enough, Mount Sinai was also where the first paralyzed surgeon (Dr. Peter Galpin - he was injured in the late 70's, before he even finished his pre-reqs, and he went to Wayne State for medical school) did part of his surgical residency. Back in 88-90, before ADA. I would definitely include them on your list.
Also consider Stony Brook. I came across a student, Dr. Dimple Bhatt, who just graduated from there in 2007 with an MD/PhD. He was also in a wheelchair before medical school and he seemed to succeed quite well at Stony. I was accepted there and when I told them about my injury, they were willing to accommodate me in whatever ways were necessary. Ms. Agnetti there did not even skip a beat when I told her what had happened and made me feel welcome and wanted in the Stony community.
Stanford currently has a paralyzed student named Cheri Blauwet who is also a competitive wheelchair athlete. She was injured as a young child, long before medical school, and she intends to go into PM&R as well.
As for me, I've chosen to attend Case Western. When I called to discuss my situation and request a deferral, they very much supported my decision to defer and began to reach out to school deans and doctors at their hospitals to ensure I had the accommodations and clinical support that I need lined up before I head to Cleveland. They also offered to put me in touch with a recent student they graduated who was in a wheelchair from the start of medical school.
I include the people's names so you can Google them and read more about their stories. They are truly inspirational.
So the short answer for your list, from my prior research: Mount Sinai, Wayne State, Stony Brook, Stanford, Case Western.
Good luck in the process, and don't let go of that determination!
This is a long and arduous process for even able-bodied people. And I don't have to tell you that with limited-to-no hand function, you will have even more obstacles in front of you. But as those who've gone before us have shown, it's not impossible.