www.nnf.cornell.edu/1999REU/ra/Siegel.pdf for some technical details. It was developed at schools like Cornell and Urbana-Champaign
Neat stuff, This could be a way to help may people with spinal injuries and other medical problems with nerves.
My personal interest lies more in utilizing such technology to unravel how networks of nuerons encode and process information. The applications have a lot of potential, but until one understands this process most approaches depend on the networks rewiring themselves appropriately around the technology. It's amazing that all of medecine still essentially depends on the bodies own regenerative powers.