Yeah, one sense goes away, the other ones get stronger. I've seen other people do this a couple years ago. There was an adult male who also went blind, and learned to use sound to navigate. He went on to teach blind kids how to do the same. Maybe this chap was one of his students <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" /> Pretty amazing though.
An interesting thing I watched on TV a few weeks back is how to give adults the ability to "see"; those who haven't been blind their whole life. There was a mexican biologist who first came up with the idea that the brain would simply rewire itself to process information. So they got a camera, a pad which could stimulate the skin by some means, and gave it to blind patients. After a while the patients were able to use this stimulating pad to "see" the world around them, recognize objects, walk along paths, even though they were blind. Some people would question if this is really "seeing", but really eyes are nothing more than an organ with very fine resolution resolution, where as the skin is an organ with very coarse resolution. If from day 1 we learned to use something other than our eyes to see the world, we could get by pretty well I think.