We have developed a small GSM telemetry module that connects easily to a Pixhawk FC.
I think the cellular network and IP based telemetry is the way to go for most prosumer/commercial drones. It allows you to forget about transmitting power, frequency, antenna polarization, etc.
We are designing Airstring to be as Plug&Play and possible and it connects right into the Pixhawk's telemetry port.
Once you start your drone, Airstring gets it online and you can access it via internet through regular apps like Mission Planner and Tower from any internet enabled device.
You can find more information on our website http://zcopters.com/airstring/
We are just finishing the details on the Kickstarter campaign and we will release a lot more infos and videos.
I'd love to hear your thoughts on the project! Please comment and contact us