Space Age Robotics Arduino-compatible project board hit version 1.0:
I’ve made a new release, v1.0, of the SARduino644 board: There are some more photos and details here
The main changes are better prototyping area (separated from the MCU pins) and more power rails. I also put the auto-reset circuit in (now that I have an FTDI basic that uses the DTR pin to trigger it).
The design files are available in the github repo