Here you can see the little guy we have just begun to use and will be releasing for sale in early October. The black Forebrain board is what was running the autopilot code in ROFL up till now, 72MHz ARM Cortex-M3 microcontroller, measures 66mm*23mm. The longer Hivebrain board is what we will switch to and will bundle as an optional upgrade to Forebrain with the ROFL kits, it's the same Forebrain pinout, but with a surface-mounted Series 2 XBee module using an external antenna, measures 111mm*23mm. No more messing around with weirdly spaced Xbee module pins!
For now it is proving an absolute god-send for PID tuning and other tweaks...speeds the process up considerably, in flight it can be used for all sorts of telemetry transfer. I'll be using this system in my upcoming video guides and demonstrations for PID tuning.