Broadband from airships: a lot of hot air?

In the late 1990s and early 2000s, anticipated demand for Internet access ran so high that several companies sprang up with plans to launch high-flying airships that would blanket cities with wireless coverage. The reasoning was that, hovering at 60,000 ft or higher, flying machines could serve an entire metro area at lower cost than a satellite launch or new wired infrastructure.
http://www.edn.com/article/CA6339271.html