1. They should rename it the "space railroad". People hate and/or are afraid of elevators. Railroads, on the other hand, bring to mind the Wild West, sleeper cars, and the golden age of travel.
2. Since these nanotubes are strong enough (in tension) to support their own weight plus a substantial load at distances beyond geosych, they should be more than strong enough to support their weight plus load over lesser distances... say, the width of an ocean. With this stuff, we could theoretically build suspension bridges between continents. Imagine the cost savings of being able to ship freight by rail between Yokohama and Los Angeles via Hawaii... or being able to drive from Key West to your winter home in the Yucatan. I propose that the first test bridge run from Florida to Cuba -- after Castro is gone, of course.
3. I can't wait for these guys to make their IPO.