Yeah it's the "RC Shield" from the campaign, which has 4 servo outputs and a bunch of ports for analog and serial (TTL for GPS and I2C for gyro). There's a picture of it in the last update, I think.
Nice frame! I like the hex frames. I'm working on a sick motor driver too. Two actually, 100w and 2kw. Has the Flutter CPU onboard and they can be daisy chained.