You could do your own single-sided serial arduino. See the main page here: http://arduino.cc/en/Main/ArduinoBoardSerialSingleSided3
Regarding your etching, I'd try this method: http://tanjent.com/doku.php?id=pcb_fabrication
You could do your own single-sided serial arduino. See the main page here: http://arduino.cc/en/Main/ArduinoBoardSerialSingleSided3
Regarding your etching, I'd try this method: http://tanjent.com/doku.php?id=pcb_fabrication