vanduino:
My list:USB Host on native USB port while externally powered (12V Vin).
Persistent RTC with breakout for backup battery.
3mm+ mounting holes in corners.
thx. the only thing we don't yet have from your list are mounting holes. These would increase the size of the board by 30% (or result in the loss of ~10 pins) which is pretty significant. We are designing this board to be a pluggable MCU board for small production runs - similar to how Arduino Pro Mini or Spark.io boards are used...
But pls let me know if you have some creative ideas.
thanks,
Valery