This was the headline many of us read yesterday in the New York Times, CNN and the BBC. A group of physicians in Poland removed cells from a quadriplegic's olfactory nerve (the only nerves that regenerate) and injected into his spinal cord. I'm not clear about where the cells were injected, or when he began to recover some function, but recover he did. He has some voluntary movement in his legs and is actually able to walk with the support of a frame.
This research is breathtaking in its persistence (it's the culmination of 40 years research) and all of the possibilities.