I know right now, there are a few people playing around with wifi-dronnes, and i know theres a ton of people using Xbees.
Let me paint you a picture called "3G/4G-UAV" utilizing 3G and 4G via smart phones could prove to be the ultimate drone ground station.
Even a tablet with 3G/4G could be used for a cellular connection to a drone.
We have already seen a simular app on the Ipad and the "parrot"
Feel free to voice your options.
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Regards
Martin.