I have seen this robot on the Arduino Forum and I find it so great and inspirational that I had to share it with you guys.
Here is Jose Julio's ArduSpider Build Log:
https://docs.google.com/document/d/19LsFuKmBgKtkqmkHkKizFh4S8bjGPOoUeJypeRv5PNY/edit?hl=es&pli=1#
https://www.youtube.com/watch?v=xqUhlYrN_Po?fs=1