We finally received the SARduino644 v1.0 boards. There’s more info on the SARduino644 v1.0 page. In short, we fixed most of the errata from v0.1, added the auto-reset circuit to the FTDI header, a bunch of power and ground rails to the prototyping area, and we separated the prototyping area from the MCU pins, so that there would be more flexibility.
In the tests, everything worked great. The auto-reset works like a charm, already worlds better than pressing the reset button and hoping for the best. We have extra PCBs from the prototyping run, so if you’re interested, drop us a line, and we’d be happy to send you one (or more!) anywhere in the world for $5.