I have an extra Arduino Mega (2560), and have been wanting to continue (reboot) the work that had previously been done on the ArduStation Mega. I have a 2.8" color touchscreen that I am going to use for the screen instead of all of the buttons and the blue monochrome screen from the old version. I am curious - what would you guys include?? I'll do the whole project as a design / build / blog. So tell me what you think; call it crowd-sourcing. XBee is an obvious requirement, but I use 9XTend modems, so it will likely be dual ported to handle either. What about Bluetooth? PWM outputs for controlling an antenna? GPS? Tactile buttons? RGB Indicator LEDs? SD Card? Onboard battery and charging? What kind of case should I use- Or should I just throw caution to the wind and pile it ALL in??