I'm curious if for blind people the back stimulation system for seeing things would start to produce visuals in a way similar to normal sight. Similar to the possiblity that ultrasound used by bats might allow them to "see."

Also, I really want to get one of those compass-belts. It seems like an incredible experiencee. I wonder how it feels to not have it on though. Losing a sense mustn't be the nicest experience.