Welcome to the Dreamshield 16 project.
The Dreamshield 16 is an Arduino Mega shield that will effectively replace or augment your limited hobby remote control system with a long range (DNT900P based) open source alternative. Your Remote will be augmented with a "basestation" board (attached to your arduino mega #1). If you do not have a nice remote, it will allow a PS3 (or other) controller to act as your remote. The receiver module will also be replaced with a similar "remote" board (attached to your arduino mega #2) that will interface up to 16 servo's and ESC's, up to two camera's, GPS, IMU, flight LED's and has an onboard pressure/temperature sensor.
More information can currently be found at :
http://diydrones.com/forum/topics/new-long-range-telemetry-shield-for-arduino-with-ps3-controller