That will be quite some spot to visit, and close for me.
It is still fun to just sit on the edge -- Toroweap for example -- toss a rock down and never see it hit.
http://www.zionnational-park.com/toroweap.htm
I bet it is breath taking but I don't think I would venture out on the skywalk!
They will probably make a movie there!
http://www.destinationgrandcanyon.com/indexe.html