Salon Machiavellian Intelligence survey:
http://www.salon.com/books/it/1999/09/13/machtest

For more background:
http://www.amazon.com/Chimpanzee-Politics-Power-among-Apes/dp/0801863368
http://www.humphrey.org.uk/papers/1976SocialFunction.pdf
For a fascinating video about Machiavellian Intelligence in a lot of animals:
http://www.youtube.com/watch?v=UyTvkpRSqUc
For theVictoria Baithwaite's book Do Fish Feel Pain?
http://www.amazon.com/Fish-Feel-Pain-Victoria-Braithwaite/dp/0199551200