What are the black connectors called like used on the Arduino board,
I was thinking of just having multiple small (or large) breadboards that bring all their pin and power leads to a single pin-header, then I can simply connect and disconnect a board without too much stress.
What's connected at the circled area near A1? Is that for a resonator?
Did you make it easy to connect something like an FTDI Basic for easy downloading? Or does one just connect to the appropriate pins once plugged in the breadboard using flying leads off the USB/RS232 adapter?