Surely we weren't the only ones to wonder aloud who would be the first come up with $150,000 for a Rex Bionics robotic exoskeleton when the Auckland-based company introduced it last summer. Of course, no price seems too high for the ability to walk again, but that's still a lot scratch to get together -- and the space has been getting a lot more competitive as of late. The honor went to fellow Kiwi Dave MacCalman, a multiple medal-winning paralympian, who lost the use of his legs after sustaining a spinal cord injury while diving into a river. The 6-foot, 4-inch athlete took his first steps in o
