I've seen a lot of very exciting new research lately about walking devices. First is Mini-generator Relies on the Power of the Walk. "Strapped to the knee, it could use energy generated by walking to run medical and other devices." I think if they could do this, they could surely use this on an orthotic or prosthetic to help in walking.
Then also, Prosthetic Limbs Give Wounded Soldiers New Life. This is another exciting development--these prosthetic limbs pretty much walk on their own!
Of course, I'm thinking about the way things like this could be used in people with CRS/SA. I do think there is too much emphasis on walking sometimes. If someone can get around in a wheelchair, with orthotics, or whatever, that's great. But if something like this can help people have more mobility and independence, that would be a good thing.