Artificial Neural Networks on Arduino

I want to share this fantastic write-up by an anonymous editor and programmer that I found today:

http://robotics.hobbizine.com/arduinoann.html

I can see pieces of this finding their way into the Tamaduino project, or at least leading to some fun experiments. It immediately had me wondering how easily the provided code could be adapted to take advantage of external memory as to not be restricted by the ATmega328's 2k SRAM.