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Old Macdonald had a Wi-Fi Farm

E-I-E-I-O. And on his farm, he had a wireless computer network. E-I-E-I-O.
With a unmanned tractor here, and automated livestock feeding there.

Eh, so it's not so catchy as the original. Nevertheless, wireless technology may end up playing a large role in rural areas, where slow-as-molasses dial up is still the forced connectivity of choice. Farmers could implement wi-fi to monitor soil moisture, control water pumps, open animal pen gates and more -- all from one location (Preferably the back porch, with a cool beer in hand).