I'm surprised to see such strong critics of the space elevator concept in this forum. Once the ribbon material is manufacturable, it is a tractable engineering problem at a very reasonable scale, and considerably smaller than many other modern engineering projects.
I have not encountered any concerns that weren't directly addressed by Edward's books and the NASA feasibility studies. Please keep an open mind, and don't dismiss it based on your own imagined problems.
While I don't have "The Space Elevator"
in front of me, the projected launch costs were very modest, and even if the paper-thin ribbon did fall on your head, it wouldn't hurt you. It also so (relatively) cheap, and offers such enormous benefits, that it would be foolish not to invest in. Of course, that applies to many things, the Polywell included.