There was a thing in the Travel section of our local paper this past weekend. The thing looks pretty hairy, jutting right out over the cliffs. They also had a pic of a member of the tribe that's building it during the construction. The guy was just walking along the edge of the thing like it was 2' off the ground. Wasn't it going to be like $25 to walk out on it?
Link to the walk:
http://www.destinationgrandcanyon.com/skywalk.html