Literally the first bullet point under Hardware says "Full access to the GPIO of the Raspberry Pi". Adding support for controlling devices using an arduino is a

Literally the first bullet point under Hardware says "Full access to the GPIO of the Raspberry Pi". Adding support for controlling devices using an arduino is an _excellent_ idea given that there are several home automation / RF shields and online recipes available for the Arduino, which makes it easier for software guys to actually get this setup working. It's also much easier to reliably implement interrupts using the Arduino, compared to the GPIOs of an ARM CPU running Linux.