I'm working on a parallel EEPROM programmer using Arduino. I'm not using the Arduino IDE since it's a pain and instead using vim and cmake.

http://imgur.com/a/IxQs5 https://github.com/manicolosi/ardburno

I'm experimenting with SPI to transfer the addresses to the shift registers faster and as you can see by the serial output, it's not quite reliable yet. Debugging timing issues is tricky.

I'm also making a PCB. I plan on making it using toner transfer method once some blank PCBs arrive.