Here's a link to the 700 sq. mile WiFi cloud.
http://www.dailywireless.org/modules...ticle&sid=3396
The cloud was built because it was the cheapest way to put a badly needed regional communications system into place. The decision was made early on to allow the people who lived there to make use of the bandwidth, only a tiny fraction of which was needed to meet the need for which it was actually built.

Municipalities and even countries are realising that the list benefits of ubiquitous, open wireless is a long, long list, and that it is easy to justify the cost of building these wireless clouds. Moreover, the cost of doing so is quickly decreasing, even as the performance characteristics of the clouds is rapidly rising. So, counting on these clouds to be there is getting to be a surer bet all the time, benefiting so many people in so many ways as they do. The 770 just happens to be the device best suited to exploit the Internet clouds, is all. Many analogies could be drawn about how it is playing out.